277005649635domain: NAppears in sequencesa(n) = binomial(n + 4, 4)*9^n.at n=9A173000a(n) = binomial(n + 7, 7)*9^n.at n=8A173192G.f. A(x) satisfies A(x) = 1 + 9*x*A(x)^(5/3).at n=9A385119