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%I #6 Oct 20 2014 17:15:17
%S 0,0,0,1,19,161,1056,6105,32747,167167,823888,3955458,18608030,
%T 86131826,393439840,1777499685,7956046035,35328205275,155792097120,
%U 682880049390,2977333542810,12919680832110,55825638835200,240301824041370,1030811804710974,4407949753291926,18795204355479776
%N A217214(n)/2.
%H Luca Ferrari and Emanuele Munarini, <a href="http://arxiv.org/abs/1203.6807">Enumeration of saturated chains in Dyck lattices</a>, arXiv preprint arXiv:1203.6807, 2012
%Y Cf. A217214.
%K nonn
%O 0,5
%A _N. J. A. Sloane_, Oct 03 2012