Number of commutation classes of reduced words for the longest element of a Weyl group of type B_n.
A180605
Number of commutation classes of reduced words for the longest element of a Weyl group of type B_n.
Terms
- a(0) =1a(1) =2a(2) =14a(3) =330a(4) =25396a(5) =6272842a(6) =4925166862
External references
- oeis: A180605