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A286867
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Number of idempotents in the twisted planar partition monoid PP_n^tau.
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1
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1, 1, 6, 44, 362, 3226, 30488, 301460, 3090020, 32618046, 345515557
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OFFSET
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0,3
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COMMENTS
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Values were computed using the Semigroups package for GAP.
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LINKS
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Table of n, a(n) for n=0..10.
Igor Dolinka, James East, Athanasios Evangelou, Desmond FitzGerald, Nicholas Ham, James Hyde, Nicholas Loughlin, Idempotent Statistics of the Motzkin and Jones Monoids, arXiv:1507.04838 [math.CO], 2015-2016.
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CROSSREFS
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Cf. A225797, A289620.
Sequence in context: A052204 A147688 A090442 * A084965 A203159 A279085
Adjacent sequences: A286864 A286865 A286866 * A286868 A286869 A286870
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KEYWORD
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nonn,more
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AUTHOR
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James East, Oct 05 2017
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STATUS
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approved
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