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%I #5 Jul 19 2015 10:23:41
%S 1,33,560,6512,58343,429319,2701215,14938495,74085099,334526731,
%T 1391777608,5386279880,19542335516,66903867676,217315477325,
%U 672858527085,1993883448271,5674663272047,15558879389713,41208936343729
%N Number of reduced words of length n in the Weyl group B_33.
%C Computed with MAGMA using commands similar to those used to compute A161409.
%D J. E. Humphreys, Reflection Groups and Coxeter Groups, Cambridge, 1990. See under Poincaré polynomial.
%D N. Bourbaki, Groupes et alg. de Lie, Chap. 4, 5, 6. (The group is defined in Planche II.)
%F G.f. for B_m is the polynomial Prod_{k=1..m}(1-x^(2k))/(1-x). Only finitely many terms are nonzero. This is a row of the triangle in A128084.
%K nonn
%O 0,2
%A _John Cannon_ and _N. J. A. Sloane_, Nov 30 2009
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