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A224287 Number of multiplicity free permutations in S_n, i.e., permutations whose Stanley symmetric function is multiplicity free. 2
1, 2, 6, 24, 120, 718, 4956, 38180, 319280, 2837959 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
This family is conjectured to be characterized by a finite set of patterns up to S_11.
LINKS
S. Billey and B. Pawlowski, Permutation Patterns, Stanley symmetric functions and generalized Specht modules, arXiv:1304.7870 [math.CO], 2013.
CROSSREFS
Sequence in context: A223905 A164872 A226437 * A248838 A364231 A364234
KEYWORD
nonn,more
AUTHOR
Sara Billey, Apr 04 2013
STATUS
approved

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Last modified March 28 14:38 EDT 2024. Contains 371254 sequences. (Running on oeis4.)