%I #5 Jul 19 2015 10:35:11
%S 1,10,54,209,649,1717,4015,8504,16599,30239,51909,84591,131625,196470,
%T 282369,391939,526724,686763,870233,1073227,1289718,1511742,1729808,
%U 1933514,2112319,2256396,2357475,2409581,2409581,2357475,2256396
%N Number of reduced words of length n in the Weyl group A_10.
%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 I.)
%F G.f. for A_m is the polynomial Prod_{k=1..m}(1-x^(k+1))/(1-x). Only finitely many terms are nonzero. This is a row of the triangle in A008302.
%K nonn
%O 0,2
%A _John Cannon_ and _N. J. A. Sloane_, Nov 30 2009
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