Table T(n,k) of number of elements of Weyl group of type D of order 2^{n-1} n! such that a reduced word uses exactly n-k distinct simple reflections 0 <= k <= n, n>=1.
A112226
Table T(n,k) of number of elements of Weyl group of type D of order 2^{n-1} n! such that a reduced word uses exactly n-k distinct simple reflections 0 <= k <= n, n>=1.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =1a(4) =2a(5) =1a(6) =13a(7) =7a(8) =3a(9) =1a(10) =135a(11) =40a(12) =12a(13) =4a(14) =1a(15) =1537a(16) =293a(17) =66a(18) =18a(19) =5a(20) =1a(21) =19811a(22) =2646a(23) =451a(24) =100a(25) =25a(26) =6a(27) =1a(28) =289073a(29) =28887
External references
- oeis: A112226