479439

Appears in sequences

• a(n) = (n+1) a(n-1) + (-1)^n.at n=8A006347
• Triangle read by rows: T(n,k) = n * T(n-1,k) + (-1)^(n-k) for 0 <= k <= n with initial values T(n,k) = 0 if n < 0 or k < 0 or k > n.at n=58A352650