Centered heptagonal number | Java program to find n - th Centered heptagonal number ; Function to find Centered heptagonal number ; Formula to calculate nth Centered heptagonal number ; Driver Code
import java . io . * ; class GFG { static long centered_heptagonal_num ( long n ) { return ( 7 * n * n - 7 * n + 2 ) / 2 ; } public static void main ( String [ ] args ) { long n = 5 ; System . out . println ( n + " th ▁ Centered ▁ " + " heptagonal ▁ number ▁ : ▁ " + centered_heptagonal_num ( n ) ) ; } }