158789030400domain: NAppears in sequencesa(n) = (n+8)!/8!.at n=10A049389a(n) = n! / {product of factorials of the digits of n}.at n=18A061603a(n) = (2n)! / (n-1)!.at n=8A126804Array t(n,m)=(n*m)!/(n + m - 1)! read by antidiagonals.at n=30A177939Array t(n,m)=(n*m)!/(n + m - 1)! read by antidiagonals.at n=33A177939