828576

Appears in sequences

• n! * Sum[k=1..ceiling(n/2), 1/k].at n=8A101610
• a(n) = (n + 1)^2*(5*n^2 + 10*n + 2)/2.at n=23A269237
• a(n) = phi(6^n-1)/n, where phi is Euler's totient function (A000010).at n=8A295496