Find the sum of the first Nth Heptadecagonal Number | Function to find the N - th heptadecagonal number ; Formula to calculate nth heptadecagonal number ; Function to find the sum of the first N heptadecagonal numbers ; Variable to store the sum ; Iterate from 1 to N ; Finding the sum ; Driver code
def heptadecagonal_num ( n ) : NEW_LINE INDENT return ( ( 15 * n * n ) - 13 * n ) // 2 NEW_LINE DEDENT def sum_heptadecagonal_num ( n ) : NEW_LINE INDENT summ = 0 NEW_LINE for i in range ( 1 , n + 1 ) : NEW_LINE INDENT summ += heptadecagonal_num ( i ) NEW_LINE DEDENT return summ NEW_LINE DEDENT if __name__ == ' _ _ main _ _ ' : NEW_LINE INDENT n = 5 NEW_LINE print ( sum_heptadecagonal_num ( n ) ) NEW_LINE DEDENT