|
%I #5 Jul 19 2015 10:21:51
%S 1,43,945,14147,162238,1519706,12107381,84352455,524443953,2954877827,
%T 15270874059,73095540169,326649986846,1371916939730,5445905213996,
%U 20530576252412,73812456221233,253999791183699,839265188017740
%N Number of reduced words of length n in the Weyl group B_43.
%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
|
