Number of reduced words of length n in the Weyl group B_12.

Terms

a(0) =1a(1) =12a(2) =77a(3) =352a(4) =1286a(5) =3992a(6) =10933a(7) =27092a(8) =61841a(9) =131768a(10) =264759a(11) =505660a(12) =923858a(13) =1623116a(14) =2753972a(15) =4528964a(16) =7240871a(17) =11284064a(18) =17178942a(19) =25599288a(20) =37402222a(21) =53660256a(22) =75694775a(23) =105110084a(24) =143826980a(25) =194114636a(26) =258619428a(27) =340389204a(28) =442891395a(29) =570023312