cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A162182 Number of reduced words of length n in the Weyl group B_44.

This page as a plain text file.
%I A162182 #5 Jul 19 2015 10:21:40
%S A162182 1,44,989,15136,177374,1697080,13804461,98156916,622600869,3577478696,
%T A162182 18848352755,91943892924,418593879770,1790510819500,7236416033496,
%U A162182 27766992285908,101579448507141,355579239690840,1194844427708580
%N A162182 Number of reduced words of length n in the Weyl group B_44.
%C A162182 Computed with MAGMA using commands similar to those used to compute A161409.
%D A162182 J. E. Humphreys, Reflection Groups and Coxeter Groups, Cambridge, 1990. See under Poincaré polynomial.
%D A162182 N. Bourbaki, Groupes et alg. de Lie, Chap. 4, 5, 6. (The group is defined in Planche II.)
%F A162182 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 A162182 nonn
%O A162182 0,2
%A A162182 _John Cannon_ and _N. J. A. Sloane_, Nov 30 2009