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 A165329 #6 Nov 23 2016 22:10:07 %S A165329 1,18,306,5202,88434,1503378,25557426,434476242,7386096114, %T A165329 125563633785,2134581771744,36287890075584,616894130535840, %U A165329 10487200206374784,178282403291884896,3030800852281773888,51523614426225577248 %N A165329 Number of reduced words of length n in Coxeter group on 18 generators S_i with relations (S_i)^2 = (S_i S_j)^9 = I. %C A165329 The initial terms coincide with those of A170737, although the two sequences are eventually different. %C A165329 Computed with MAGMA using commands similar to those used to compute A154638. %H A165329 <a href="/index/Rec#order_09">Index entries for linear recurrences with constant coefficients</a>, signature (16, 16, 16, 16, 16, 16, 16, 16, -136). %F A165329 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 A165329 1)/(136*t^9 - 16*t^8 - 16*t^7 - 16*t^6 - 16*t^5 - 16*t^4 - 16*t^3 - %F A165329 16*t^2 - 16*t + 1) %K A165329 nonn %O A165329 0,2 %A A165329 _John Cannon_ and _N. J. A. Sloane_, Dec 03 2009