Number of reduced words of length n in the Weyl group D_23.

Terms

a(0) =1a(1) =23a(2) =275a(3) =2277a(4) =14673a(5) =78407a(6) =361514a(7) =1477750a(8) =5461235a(9) =18518565a(10) =58282576a(11) =171815888a(12) =477989151a(13) =1262643305a(14) =3183445871a(15) =7694405993a(16) =17895700206a(17) =40182143330a(18) =87349858045a(19) =184297593435a(20) =378236260170a(21) =756560791350