8016008domain: NAppears in sequencesa(n) = C(n+4,4) * C(n+6,6).at n=10A105947Coefficients T(n,k) of x^n*y^(n-k)*z^k in function A = A(x,y,z) such that A = 1 + x*B*C, B = 1 + y*C*A, and C = 1 + z*A*B, as a triangle read by rows.at n=60A323324