5381376000domain: NAppears in sequencesa(n) = (3*n)!/3^n.at n=5A210277Number of permutations of [1..n] that achieve a lower bound on the dominating set.at n=14A272641Expansion of e.g.f. 1 / ( 1 - Sum_{k>=0} x^(5*k+3) / (5*k+3) ).at n=15A365982