446292domain: NAppears in sequencesNumber of nonroot branch nodes in all noncrossing rooted trees on n nodes on a circle.at n=8A045737Partial sums of A051836.at n=19A051923a(n) = (1/2)*(n + 1)*(5*n^2 + 15*n + 6)*Pochhammer(n, 6) / 6!.at n=6A293612