login
This site is supported by donations to The OEIS Foundation.

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A193937 6-nonnesting permutations. 3
1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3628800, 39916680, 478991641, 6226516930, 87157924751, 1306945300264 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Also the number of 6-noncrossing permutations.

REFERENCES

S. Corteel, Crossings and alignments of permutations, Adv. in Appl. Math., 38(2)(2007), 149-163.

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, 2011

CROSSREFS

Cf. A193938, A193935, A193936.

Sequence in context: A154658 A179369 A267390 * A072167 A230233 A154659

Adjacent sequences:  A193934 A193935 A193936 * A193938 A193939 A193940

KEYWORD

nonn,more

AUTHOR

Lily Yen, Aug 09 2011

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 7 03:00 EST 2019. Contains 329836 sequences. (Running on oeis4.)