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Number of lattice congruences of the weak order on the Coxeter group B_n.
1

%I #2 Jun 29 2008 03:00:00

%S 1,2,19,8368,360350697981

%N Number of lattice congruences of the weak order on the Coxeter group B_n.

%C For n=0,1,2,3,4, we have a(n+1) ~ [a(n)]^3 as a very rough order-of-magnitude approximation.

%H N. Reading, <a href="http://arXiv.org/abs/math.CO/0401404">Lattice congruences of the weak order</a>.

%Y Cf. A091687.

%K hard,more,nonn

%O 0,2

%A Nathan Reading (nreading(AT)umich.edu), Jan 28 2004