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A091688 Number of lattice congruences of the weak order on the Coxeter group B_n. 1
1, 2, 19, 8368, 360350697981 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
COMMENTS
For n=0,1,2,3,4, we have a(n+1) ~ [a(n)]^3 as a very rough order-of-magnitude approximation.
LINKS
CROSSREFS
Cf. A091687.
Sequence in context: A024229 A094663 A274762 * A306207 A355466 A073444
KEYWORD
hard,more,nonn
AUTHOR
Nathan Reading (nreading(AT)umich.edu), Jan 28 2004
STATUS
approved

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Last modified June 20 16:01 EDT 2024. Contains 373526 sequences. (Running on oeis4.)