39516

Appears in sequences

• Heptagonal (or 7-gonal) pyramidal numbers: a(n) = n*(n+1)*(5*n-2)/6.at n=36A002413
• a(n) = A026907(2*n, n).at n=6A026908
• T(n,[ n/2 ]), T given by A026907.at n=12A026914
• Numbers n such that n | sigma_12(n).at n=34A055716
• Non-palindromic solutions to sigma(R(n)) = sigma(n), where R = A004086 is digit-reversal.at n=19A085329
• Even heptagonal pyramidal numbers.at n=26A218325