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.
%I A162176 #5 Jul 19 2015 10:22:21
%S A162176 1,40,819,11440,122589,1074488,8020830,52427192,306189025,1622495952,
%T A162176 7895219982,35623107520,150221110689,595982725640,2237008815175,
%U A162176 7981961442768,27186526166255,88708246063240,278172606877930
%N A162176 Number of reduced words of length n in the Weyl group B_40.
%C A162176 Computed with MAGMA using commands similar to those used to compute A161409.
%D A162176 J. E. Humphreys, Reflection Groups and Coxeter Groups, Cambridge, 1990. See under Poincaré polynomial.
%D A162176 N. Bourbaki, Groupes et alg. de Lie, Chap. 4, 5, 6. (The group is defined in Planche II.)
%F A162176 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 A162176 nonn
%O A162176 0,2
%A A162176 _John Cannon_ and _N. J. A. Sloane_, Nov 30 2009