A193937 6-nonnesting permutations.

1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3628800, 39916680, 478991641, 6226516930, 87157924751, 1306945300264

Offset

1,2

Comments

Also the number of 6-noncrossing permutations.

Links

Table of n, a(n) for n=1..15.

Sophie Burrill, Sergi Elizalde, Marni Mishna and Lily Yen, A generating tree approach to k-nonnesting partitions and permutations, arXiv preprint arXiv:1108.5615 [math.CO], 2011-2014.

S. Corteel, Crossings and alignments of permutations, Adv. Appl. Math 38 (2007) 149-163.

Crossrefs

Cf. A193938, A193935, A193936.

Sequence in context: A179369 A267390 A360463 * A072167 A230233 A154659

Adjacent sequences: A193934 A193935 A193936 * A193938 A193939 A193940

Keyword

nonn,more

Author

Lily Yen, Aug 09 2011

Status

approved