Number of reduced words of length n in the Weyl group A_17.

Terms

a(0) =1a(1) =17a(2) =152a(3) =951a(4) =4674a(5) =19210a(6) =68646a(7) =218995a(8) =635682a(9) =1703027a(10) =4257634a(11) =10020277a(12) =22357907a(13) =47572239a(14) =96997223a(15) =190297064a(16) =360490592a(17) =661386105a(18) =1178290263a(19) =2043049102a(20) =3454679139a(21) =5707038378a(22) =9225153393a(23) =14611938428a(24) =22707091351