4263600domain: NAppears in sequencesNumber of partitions of an n-gon into (n-5) parts.at n=7A002060Cayley's triangle of V numbers; triangle V(n,k), n >= 4, n <= k <= 2*n-4, read by rows.at n=62A259476a(n) = (3*n + 7)*Pochhammer(n, 5) / 4!.at n=16A293608