59487568920domain: NAppears in sequencesa(n) = binomial(8*n, n-8).at n=7A004389Triangle, read by rows, where T(n,k) = C( C(n+2,3) - C(k+2,3) + 1, n-k) for n>=k>=0.at n=37A126450Column 1 of triangle A126450; a(n) = C( C(n+3,3), n).at n=7A126452