Number of reduced words of length n in the Weyl group B_17.

Terms

a(0) =1a(1) =17a(2) =152a(3) =952a(4) =4691a(5) =19363a(6) =69615a(7) =223839a(8) =656013a(9) =1777469a(10) =4501652a(11) =10749780a(12) =24374702a(13) =52784014a(14) =109694031a(15) =219658751a(16) =425310726a(17) =798645126a(18) =1458198681a(19) =2594648969a(20) =4508216638a(21) =7662325662a(22) =12759298116a(23) =20845464260a(24) =33454989519a(25) =52803989119a(26) =82049147514