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 A165547 #6 Nov 23 2016 22:13:56 %S A165547 1,31,930,27900,837000,25110000,753300000,22599000000,677970000000, %T A165547 20339099999535,610172999972100,18305189998744965,549155699949807900, %U A165547 16474670998118005500,494240129932253220000,14827203897628988250000 %N A165547 Number of reduced words of length n in Coxeter group on 31 generators S_i with relations (S_i)^2 = (S_i S_j)^9 = I. %C A165547 The initial terms coincide with those of A170750, although the two sequences are eventually different. %C A165547 Computed with MAGMA using commands similar to those used to compute A154638. %H A165547 <a href="/index/Rec#order_09">Index entries for linear recurrences with constant coefficients</a>, signature (29, 29, 29, 29, 29, 29, 29, 29, -435). %F A165547 G.f. (t^9 + 2*t^8 + 2*t^7 + 2*t^6 + 2*t^5 + 2*t^4 + 2*t^3 + 2*t^2 + 2*t + %F A165547 1)/(435*t^9 - 29*t^8 - 29*t^7 - 29*t^6 - 29*t^5 - 29*t^4 - 29*t^3 - %F A165547 29*t^2 - 29*t + 1) %K A165547 nonn %O A165547 0,2 %A A165547 _John Cannon_ and _N. J. A. Sloane_, Dec 03 2009