11708971560domain: NAppears in sequencesa(n) = (n+1)*binomial(n+1,12).at n=21A027772f(n,n+3) where f is given in A034261.at n=15A034270G.f.: 3F2([2/9, 4/9, 5/9], [1/3, 1], 729 x).at n=4A275457