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 A167096 #9 Nov 24 2016 10:35:50 %S A167096 1,43,1806,75852,3185784,133802928,5619722976,236028364992, %T A167096 9913191329664,416354035845888,17486869505527296,734448519232146432, %U A167096 30846837807750150144,1295567187925506305145,54413821892871264778164 %N A167096 Number of reduced words of length n in Coxeter group on 43 generators S_i with relations (S_i)^2 = (S_i S_j)^13 = I. %C A167096 The initial terms coincide with those of A170762, although the two sequences are eventually different. %C A167096 Computed with MAGMA using commands similar to those used to compute A154638. %H A167096 G. C. Greubel, <a href="/A167096/b167096.txt">Table of n, a(n) for n = 0..500</a> %H A167096 <a href="/index/Rec#order_13">Index entries for linear recurrences with constant coefficients</a>, signature (41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, -861). %F A167096 G.f.: (t^13 + 2*t^12 + 2*t^11 + 2*t^10 + 2*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 + 1)/(861*t^13 - 41*t^12 - 41*t^11 - 41*t^10 - 41*t^9 - 41*t^8 - 41*t^7 - 41*t^6 - 41*t^5 - 41*t^4 - 41*t^3 - 41*t^2 - 41*t + 1). %t A167096 CoefficientList[Series[(t^13 + 2*t^12 + 2*t^11 + 2*t^10 + 2*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 + 1)/(861*t^13 - 41*t^12 - 41*t^11 - 41*t^10 - 41*t^9 - 41*t^8 - 41*t^7 - 41*t^6 - 41*t^5 - 41*t^4 - 41*t^3 - 41*t^2 - 41*t + 1), {t, 0, 50}], t] (* _G. C. Greubel_, Jun 02 2016 *) %K A167096 nonn %O A167096 0,2 %A A167096 _John Cannon_ and _N. J. A. Sloane_, Dec 03 2009