Number of reduced words of length n in the Weyl group D_11.

Terms

a(0) =1a(1) =11a(2) =65a(3) =275a(4) =934a(5) =2706a(6) =6941a(7) =16159a(8) =34749a(9) =69927a(10) =132991a(11) =240900a(12) =418187a(13) =699193a(14) =1130581a(15) =1774058a(16) =2709201a(17) =4036252a(18) =5878719a(19) =8385597a(20) =11733007a(21) =16125043a(22) =21793619a(23) =28997122a(24) =38017704a(25) =49157086a(26) =62730799a(27) =79060850a(28) =98466873a(29) =121255904