79833599

Appears in sequences

• a(0) = 1, a(1) = 1, a(n+1) = (n+1)*a(n) + n.at n=11A020543
• If n is even, 2(n/2 + 1)! - 1; if n is odd, ((n + 1)/2 + 1)! - 1.at n=19A030494
• a(n) = (n! - 6)/6.at n=9A139176