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 A164674 #6 Nov 23 2016 18:03:07 %S A164674 1,38,1406,52022,1924814,71218118,2635070366,97497602839, %T A164674 3607411279032,133474216362480,4938545969828712,182726199567089568, %U A164674 6760869335269121304,250152163602569357904,9255629986606705913226 %N A164674 Number of reduced words of length n in Coxeter group on 38 generators S_i with relations (S_i)^2 = (S_i S_j)^7 = I. %C A164674 The initial terms coincide with those of A170757, although the two sequences are eventually different. %C A164674 Computed with MAGMA using commands similar to those used to compute A154638. %H A164674 <a href="/index/Rec#order_07">Index entries for linear recurrences with constant coefficients</a>, signature (36, 36, 36, 36, 36, 36, -666). %F A164674 G.f. (t^7 + 2*t^6 + 2*t^5 + 2*t^4 + 2*t^3 + 2*t^2 + 2*t + 1)/(666*t^7 - 36*t^6 - %F A164674 36*t^5 - 36*t^4 - 36*t^3 - 36*t^2 - 36*t + 1) %K A164674 nonn %O A164674 0,2 %A A164674 _John Cannon_ and _N. J. A. Sloane_, Dec 03 2009