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 A167116 #10 Nov 24 2016 10:45:46 %S A167116 1,15,210,2940,41160,576240,8067360,112943040,1581202560,22136835840, %T A167116 309915701760,4338819824640,60743477544960,850408685629440, %U A167116 11905721598812055,166680102383367300,2333521433367121725 %N A167116 Number of reduced words of length n in Coxeter group on 15 generators S_i with relations (S_i)^2 = (S_i S_j)^14 = I. %C A167116 The initial terms coincide with those of A170734, although the two sequences are eventually different. %C A167116 Computed with MAGMA using commands similar to those used to compute A154638. %H A167116 G. C. Greubel, <a href="/A167116/b167116.txt">Table of n, a(n) for n = 0..500</a> %H A167116 <a href="/index/Rec#order_14">Index entries for linear recurrences with constant coefficients</a>, signature (13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, -91). %F A167116 G.f.: (t^14 + 2*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)/(91*t^14 - 13*t^13 - 13*t^12 - 13*t^11 - 13*t^10 - 13*t^9 - 13*t^8 - 13*t^7 - 13*t^6 - 13*t^5 - 13*t^4 - 13*t^3 - 13*t^2 - 13*t + 1). %t A167116 CoefficientList[Series[(t^14 + 2*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)/ (91*t^14 - 13*t^13 - 13*t^12 - 13*t^11 - 13*t^10 - 13*t^9 - 13*t^8 - 13*t^7 - 13*t^6 - 13*t^5 - 13*t^4 - 13*t^3 - 13*t^2 - 13*t + 1), {t, 0, 50}], t] (* _G. C. Greubel_, Jun 03 2016 *) %K A167116 nonn %O A167116 0,2 %A A167116 _John Cannon_ and _N. J. A. Sloane_, Dec 03 2009