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 A162411 #7 Feb 21 2024 11:48:30 %S A162411 1,42,902,13202,148091,1357468,10587675,72245074,440091498,2430433874, %T A162411 12315996232,57824666110,253554446677,1045266952884,4073988274266, %U A162411 15084671038416,53281879968821,180187334962466,585265396834041 %N A162411 Number of reduced words of length n in the Weyl group D_42. %C A162411 Computed with MAGMA using commands similar to those used to compute A161409. %D A162411 N. Bourbaki, Groupes et alg. de Lie, Chap. 4, 5, 6. (The group is defined in Planche IV.) %D A162411 J. E. Humphreys, Reflection Groups and Coxeter Groups, Cambridge, 1990. See under Poincaré polynomial. %H A162411 <a href="/index/Gre#GROWTH">Index entries for growth series for groups</a> %F A162411 G.f. for D_m is the polynomial f(n) * Product( f(2i), i=1..n-1 )/ f(1)^n, where f(k) = 1-x^k. Only finitely many terms are nonzero. This is a row of the triangle in A162206. %Y A162411 Growth series for groups D_n, n = 3,...,50: A161435, A162207, A162208, A162209, A162210, A162211, A162212, A162248, A162288, A162297, A162300, A162301, A162321, A162327, A162328, A162346, A162347, A162359, A162360, A162364, A162365, A162366, A162367, A162368, A162369, A162370, A162376, A162377, A162378, A162379, A162380, A162381, A162384, A162388, A162389, A162392, A162399, A162402, A162403, A162411, A162412, A162413, A162418, A162452, A162456, A162461, A162469, A162492; also A162206. %K A162411 nonn %O A162411 0,2 %A A162411 _John Cannon_ and _N. J. A. Sloane_, Dec 01 2009