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 A164970 #6 Nov 23 2016 18:31:09 %S A164970 1,28,756,20412,551124,14880348,401769396,10847773692,292889889306, %T A164970 7908027001056,213516728753328,5764951668909888,155653694859957840, %U A164970 4202649755802415008,113471543260421145072,3063731664082781293056 %N A164970 Number of reduced words of length n in Coxeter group on 28 generators S_i with relations (S_i)^2 = (S_i S_j)^8 = I. %C A164970 The initial terms coincide with those of A170747, although the two sequences are eventually different. %C A164970 Computed with MAGMA using commands similar to those used to compute A154638. %H A164970 <a href="/index/Rec#order_08">Index entries for linear recurrences with constant coefficients</a>, signature (26, 26, 26, 26, 26, 26, 26, -351). %F A164970 G.f. (t^8 + 2*t^7 + 2*t^6 + 2*t^5 + 2*t^4 + 2*t^3 + 2*t^2 + 2*t + 1)/(351*t^8 - %F A164970 26*t^7 - 26*t^6 - 26*t^5 - 26*t^4 - 26*t^3 - 26*t^2 - 26*t + 1) %K A164970 nonn %O A164970 0,2 %A A164970 _John Cannon_ and _N. J. A. Sloane_, Dec 03 2009