4012711

Appears in sequences

• a(n) = n*a(n-1) - a(n-2) + 1 + (-1)^n.at n=10A003470
• a(n) = Sum_{k=0..n-1} Gamma(n + k) / Gamma(n - k) for n > 0, a(0) = 1. Row sums of A362787.at n=6A362846