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A224318
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Number of 2-vexillary permutations in S_n, that, permutations whose Stanley symmetric function has at most 2 terms or at most 2 Edelman-Greene tableaux.
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4
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1, 1, 2, 6, 24, 118, 661, 4011, 25654, 170420, 1165697
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OFFSET
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0,3
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COMMENTS
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This family is characterized by a finite set of permutation patterns.
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LINKS
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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