# Centered octagonal number

Here given code implementation process.

``````// C Program for
// Centered octagonal number
#include <stdio.h>

void centeredOctagonalNo(int k)
{
// Print all initial k centered octagonal number
for (int n = 1; n <= k; ++n)
{
//   Formula
//   (4n² - 4n + 1)

// Calculate nth octagonal number
int result = ((4 *(n *n) - 4 *n + 1));

// Display Calculated value
printf("  %d", result);
}
}
int main()
{
// Centered octagonal numbers are
// —————————————————————————————————————————————
//   1, 9, 25, 49, 81, 121, 169, 225, 289, 361
//   441, 529, 625, 729, 841, 961 ... etc
//  Test  k = 10
centeredOctagonalNo(10);
return 0;
}``````

#### Output

``  1  9  25  49  81  121  169  225  289  361``
``````// Java program for
// Centered octagonal number
public class CenteredOctagonal
{
public void centeredOctagonalNo(int k)
{
// Print all initial k centered octagonal number
for (int n = 1; n <= k; ++n)
{
//   Formula
//   (4n² - 4n + 1)

// Calculate nth octagonal number
int result = ((4 * (n * n) - 4 * n + 1));

// Display calculated result
System.out.print(" " + result);
}
}
public static void main(String[] args)
{
// Centered octagonal numbers are
// —————————————————————————————————————————————
//   1, 9, 25, 49, 81, 121, 169, 225, 289, 361
//   441, 529, 625, 729, 841, 961 ... etc
//  Test  k = 10
}
}``````

#### Output

`` 1 9 25 49 81 121 169 225 289 361``
``````// Include header file
#include <iostream>
using namespace std;
// C++ program for
// Centered octagonal number

class CenteredOctagonal
{
public: void centeredOctagonalNo(int k)
{
// Print all initial k centered octagonal number
for (int n = 1; n <= k; ++n)
{
//   Formula
//   (4n² - 4n + 1)

// Calculate nth octagonal number
int result = ((4 *(n *n) - 4 *n + 1));

// Display calculated result
cout << " " << result;
}
}
};
int main()
{
// Centered octagonal numbers are
// —————————————————————————————————————————————
//   1, 9, 25, 49, 81, 121, 169, 225, 289, 361
//   441, 529, 625, 729, 841, 961 ... etc
//  Test  k = 10
return 0;
}``````

#### Output

`` 1 9 25 49 81 121 169 225 289 361``
``````// Include namespace system
using System;
// Csharp program for
// Centered octagonal number
public class CenteredOctagonal
{
public void centeredOctagonalNo(int k)
{
// Print all initial k centered octagonal number
for (int n = 1; n <= k; ++n)
{
//   Formula
//   (4n² - 4n + 1)

// Calculate nth octagonal number
int result = ((4 * (n * n) - 4 * n + 1));

// Display calculated result
Console.Write(" " + result);
}
}
public static void Main(String[] args)
{
// Centered octagonal numbers are
// —————————————————————————————————————————————
//   1, 9, 25, 49, 81, 121, 169, 225, 289, 361
//   441, 529, 625, 729, 841, 961 ... etc
//  Test  k = 10
}
}``````

#### Output

`` 1 9 25 49 81 121 169 225 289 361``
``````package main
import "fmt"
// Go program for
// Centered octagonal number

func centeredOctagonalNo(k int) {
// Print all initial k centered octagonal number
for n := 1 ; n <= k ; n++ {
//   Formula
//   (4n² - 4n + 1)

// Calculate nth octagonal number
var result int = ((4 * (n * n) - 4 * n + 1))

// Display calculated result
fmt.Print(" ", result)
}
}
func main() {

// Centered octagonal numbers are
// —————————————————————————————————————————————
//   1, 9, 25, 49, 81, 121, 169, 225, 289, 361
//   441, 529, 625, 729, 841, 961 ... etc

//  Test  k = 10
centeredOctagonalNo(10)
}``````

#### Output

`` 1 9 25 49 81 121 169 225 289 361``
``````<?php
// Php program for
// Centered octagonal number
class CenteredOctagonal
{
public	function centeredOctagonalNo(\$k)
{
// Print all initial k centered octagonal number
for (\$n = 1; \$n <= \$k; ++\$n)
{
//   Formula
//   (4n² - 4n + 1)

// Calculate nth octagonal number
\$result = ((4 * (\$n * \$n) - 4 * \$n + 1));

// Display calculated result
echo(" ".\$result);
}
}
}

function main()
{
// Centered octagonal numbers are
// —————————————————————————————————————————————
//   1, 9, 25, 49, 81, 121, 169, 225, 289, 361
//   441, 529, 625, 729, 841, 961 ... etc
//  Test  k = 10
}
main();``````

#### Output

`` 1 9 25 49 81 121 169 225 289 361``
``````// Node JS program for
// Centered octagonal number
class CenteredOctagonal
{
centeredOctagonalNo(k)
{
// Print all initial k centered octagonal number
for (var n = 1; n <= k; ++n)
{
//   Formula
//   (4n² - 4n + 1)

// Calculate nth octagonal number
var result = ((4 * (n * n) - 4 * n + 1));

// Display calculated result
process.stdout.write(" " + result);
}
}
}

function main()
{
// Centered octagonal numbers are
// —————————————————————————————————————————————
//   1, 9, 25, 49, 81, 121, 169, 225, 289, 361
//   441, 529, 625, 729, 841, 961 ... etc

//  Test  k = 10
}
main();``````

#### Output

`` 1 9 25 49 81 121 169 225 289 361``
``````#  Python 3 program for
#  Centered octagonal number
class CenteredOctagonal :
def centeredOctagonalNo(self, k) :
n = 1
#  Print all initial k centered octagonal number
while (n <= k) :
#    Formula
#    (4n² - 4n + 1)

#  Calculate nth octagonal number
result = ((4 * (n * n) - 4 * n + 1))

#  Display calculated result
print(" ", result, end = "")
n += 1

def main() :
#  Centered octagonal numbers are
#  —————————————————————————————————————————————
#    1, 9, 25, 49, 81, 121, 169, 225, 289, 361
#    441, 529, 625, 729, 841, 961 ... etc

#   Test  k = 10

if __name__ == "__main__": main()``````

#### Output

``  1  9  25  49  81  121  169  225  289  361``
``````#  Ruby program for
#  Centered octagonal number
class CenteredOctagonal
def centeredOctagonalNo(k)
n = 1
#  Print all initial k centered octagonal number
while (n <= k)
#    Formula
#    (4n² - 4n + 1)

#  Calculate nth octagonal number
result = ((4 * (n * n) - 4 * n + 1))

#  Display calculated result
print(" ", result)
n += 1
end

end

end

def main()
#  Centered octagonal numbers are
#  —————————————————————————————————————————————
#    1, 9, 25, 49, 81, 121, 169, 225, 289, 361
#    441, 529, 625, 729, 841, 961 ... etc

#   Test  k = 10
end

main()``````

#### Output

`` 1 9 25 49 81 121 169 225 289 361``
``````// Scala program for
// Centered octagonal number
class CenteredOctagonal()
{
def centeredOctagonalNo(k: Int): Unit = {
var n: Int = 1;
// Print all initial k centered octagonal number
while (n <= k)
{
//   Formula
//   (4n² - 4n + 1)

// Calculate nth octagonal number
var result: Int = ((4 * (n * n) - 4 * n + 1));

// Display calculated result
print(" " + result);
n += 1;
}
}
}
object Main
{
def main(args: Array[String]): Unit = {
var task: CenteredOctagonal = new CenteredOctagonal();
// Centered octagonal numbers are
// —————————————————————————————————————————————
//   1, 9, 25, 49, 81, 121, 169, 225, 289, 361
//   441, 529, 625, 729, 841, 961 ... etc

//  Test  k = 10
}
}``````

#### Output

`` 1 9 25 49 81 121 169 225 289 361``
``````// Swift 4 program for
// Centered octagonal number
class CenteredOctagonal
{
func centeredOctagonalNo(_ k: Int)
{
var n: Int = 1;
// Print all initial k centered octagonal number
while (n <= k)
{
//   Formula
//   (4n² - 4n + 1)

// Calculate nth octagonal number
let result: Int = ((4 * (n * n) - 4 * n + 1));

// Display calculated result
print(" ", result, terminator: "");
n += 1;
}
}
}
func main()
{
// Centered octagonal numbers are
// —————————————————————————————————————————————
//   1, 9, 25, 49, 81, 121, 169, 225, 289, 361
//   441, 529, 625, 729, 841, 961 ... etc

//  Test  k = 10
}
main();``````

#### Output

``  1  9  25  49  81  121  169  225  289  361``
``````// Kotlin program for
// Centered octagonal number
class CenteredOctagonal
{
fun centeredOctagonalNo(k: Int): Unit
{
var n: Int = 1;
// Print all initial k centered octagonal number
while (n <= k)
{
//   Formula
//   (4n² - 4n + 1)

// Calculate nth octagonal number
val result: Int = ((4 * (n * n) - 4 * n + 1));

// Display calculated result
print(" " + result);
n += 1;
}
}
}
fun main(args: Array < String > ): Unit
{
// Centered octagonal numbers are
// —————————————————————————————————————————————
//   1, 9, 25, 49, 81, 121, 169, 225, 289, 361
//   441, 529, 625, 729, 841, 961 ... etc

//  Test  k = 10
}``````

#### Output

`` 1 9 25 49 81 121 169 225 289 361``

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