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%I #19 Jun 14 2020 09:42:34
%S 1,2,6,24,120,720,5040,40320,362880,3628800,39916680,478991641,
%T 6226516930,87157924751,1306945300264
%N 6-nonnesting permutations.
%C Also the number of 6-noncrossing permutations.
%H Sophie Burrill, Sergi Elizalde, Marni Mishna and Lily Yen, <a href="http://arxiv.org/abs/1108.5615">A generating tree approach to k-nonnesting partitions and permutations</a>, arXiv preprint arXiv:1108.5615 [math.CO], 2011-2014.
%H S. Corteel, <a href="http://dx.doi.org/10.1016/j.aam.2006.01.006">Crossings and alignments of permutations</a>, Adv. Appl. Math 38 (2007) 149-163.
%Y Cf. A193938, A193935, A193936.
%K nonn,more
%O 1,2
%A _Lily Yen_, Aug 09 2011
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