Number of reduced words of length n in the Weyl group A_13.

Terms

a(0) =1a(1) =13a(2) =90a(3) =441a(4) =1715a(5) =5629a(6) =16198a(7) =41926a(8) =99412a(9) =218895a(10) =452284a(11) =884170a(12) =1646177a(13) =2934764a(14) =5032235a(15) =8330256a(16) =13354639a(17) =20789572a(18) =31498907a(19) =46541635a(20) =67178356a(21) =94865470a(22) =131234038a(23) =178050835a(24) =237160055a(25) =310405409a(26) =399533919a(27) =506084453a(28) =631265833a(29) =775831020