%I #9 Jul 06 2017 16:49:03
%S 1,3,18,126,936,7164,55800,439560,3489696
%N Sum of factorial-Catalan numbers over a certain family of decorations.
%C The precise definition involves the use of certain symbols akin to the peace symbol.
%H Vincent Pilaud, V. Pons, <a href="http://arxiv.org/abs/1606.09643">Permutrees</a>, arXiv preprint arXiv:1606.09643 [math.CO], 2016.
%Y Cf. A289427, A289428, A289430, A289431.
%K nonn,more
%O 0,2
%A _N. J. A. Sloane_, Jul 06 2017