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 A164706 #10 Feb 23 2024 04:20:41 %S A164706 1,5,20,80,320,1280,5120,20480,81910,327600,1310250,5240400,20959200, %T A164706 83827200,335270400,1340928000,5363097690,21449933820,85789908630, %U A164706 343120332420,1372324139280,5488667867520,21952156999680,87798571269120 %N A164706 Number of reduced words of length n in Coxeter group on 5 generators S_i with relations (S_i)^2 = (S_i S_j)^8 = I. %C A164706 The initial terms coincide with those of A003947, although the two sequences are eventually different. %C A164706 Computed with MAGMA using commands similar to those used to compute A154638. %H A164706 <a href="/index/Rec#order_08">Index entries for linear recurrences with constant coefficients</a>, signature (3, 3, 3, 3, 3, 3, 3, -6). %F A164706 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)/(6*t^8 - 3*t^7 - 3*t^6 - 3*t^5 - 3*t^4 - 3*t^3 - 3*t^2 - 3*t + 1). %K A164706 nonn %O A164706 0,2 %A A164706 _John Cannon_ and _N. J. A. Sloane_, Dec 03 2009