899749479915domain: NAppears in sequencesTriangle, 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=36A126450Column 0 of triangle A126450; a(n) = C( C(n+2,3) + 1, n).at n=8A126451