72253440

Appears in sequences

• List of pairs (a(n),b(n)): f(n) = A004001(n); a(n) = f(n) + a(n-1); b(n) = f(n)*b(n-1).at n=29A154280
• Partial products of A004001.at n=14A172452
• a(n) = A203305(n)/A000178(n) where A000178 are superfactorials.at n=4A203465
• Triangle read by rows: T(n, k) = (T(n-1, k-1) + T(n-1, k)) * 2 * n with initial values T(n, 0) = Sum_{i=0..n} (-1)^(n-i) * binomial(n, i) * A001147(i) and T(i, j) = 0 if j > i.at n=43A372260