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A224287
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Number of multiplicity free permutations in S_n, i.e., permutations whose Stanley symmetric function is multiplicity free.
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2
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OFFSET
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1,2
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COMMENTS
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This family is conjectured to be characterized by a finite set of patterns up to S_11.
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LINKS
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Table of n, a(n) for n=1..10.
S. Billey and B. Pawlowski, Permutation Patterns, Stanley symmetric functions and generalized Specht modules, arXiv:1304.7870 [math.CO], 2013.
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CROSSREFS
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Cf. A005802, A223905, A224318.
Sequence in context: A223905 A164872 A226437 * A248838 A052398 A047890
Adjacent sequences: A224284 A224285 A224286 * A224288 A224289 A224290
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KEYWORD
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nonn,more
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AUTHOR
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Sara Billey, Apr 04 2013
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STATUS
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approved
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