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Search: id:A091688
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| A091688 |
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Number of lattice congruences of the weak order on the Coxeter group B_n. |
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+0
2
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OFFSET
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0,2
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COMMENT
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For n=0,1,2,3,4, we have a(n+1) ~ [a(n)]^3 as a very rough order-of-magnitude approximation.
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LINKS
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N. Reading, Lattice congruences of the weak order.
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CROSSREFS
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Cf. A091687.
Sequence in context: A013107 A024229 A094663 this_sequence A073444 A082259 A077339
Adjacent sequences: A091685 A091686 A091687 this_sequence A091689 A091690 A091691
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KEYWORD
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hard,more,nonn
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AUTHOR
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Nathan Reading (nreading(AT)umich.edu), Jan 28 2004
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