493825

Appears in sequences

• Square array, read by antidiagonals: form the Euler-Seidel matrix for the sequence {2^k*k!} and then divide column k by 2^k*k!.at n=29A143411
• Triangle read by rows: T(n, k) = n! * 2^k * hypergeom([-k], [-n], 1/2).at n=34A374428