63140314380domain: NAppears in sequencesTriangle, read by rows, where T(n,k) = C( C(n+2,3) - C(k+2,3) + 2, n-k) for n>=k>=0.at n=37A126454Column 1 of triangle A126454; a(n) = C( C(n+3,3) + 1, n).at n=7A126456