Number of reduced words of length n in the Weyl group D_16.

Terms

a(0) =1a(1) =16a(2) =135a(3) =800a(4) =3739a(5) =14672a(6) =50252a(7) =154224a(8) =432174a(9) =1121456a(10) =2724183a(11) =6248128a(12) =13624922a(13) =28409312a(14) =56910017a(15) =109964720a(16) =205651974a(17) =373334384a(18) =659553420a(19) =1136449488a(20) =1913563930a(21) =3154094352a(22) =5096922202a(23) =8086011920a(24) =12609093085a(25) =19347878144a(26) =29242434212a(27) =43572711936