Number of reduced words of length n in the Weyl group A_11.

Terms

a(0) =1a(1) =11a(2) =65a(3) =274a(4) =923a(5) =2640a(6) =6655a(7) =15159a(8) =31758a(9) =61997a(10) =113906a(11) =198497a(12) =330121a(13) =526581a(14) =808896a(15) =1200626a(16) =1726701a(17) =2411747a(18) =3277965a(19) =4342688a(20) =5615807a(21) =7097310a(22) =8775209a(23) =10624132a(24) =12604826a(25) =14664752a(26) =16739858a(27) =18757500a(28) =20640357a(29) =22311069