A091688 Number of lattice congruences of the weak order on the Coxeter group B_n.

1, 2, 19, 8368, 360350697981

Offset: 0

Author

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

Keywords

• hard
• more
• nonn

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

• N. Reading, Lattice congruences of the weak order.

Crossrefs

Cf. A091687.