124405domain: NAppears in sequencesSquare array A(n,k) = (n!)^3 [x^n] hypergeom([], [1, 1], z)^k read by antidiagonals.at n=49A287698a(n) = (4!)^3 * [z^4] hypergeom([], [1,1], z)^n.at n=5A287700