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 A164867 #8 Nov 23 2016 18:27:01
%S A164867 1,16,240,3600,54000,810000,12150000,182250000,2733749880,41006246400,
%T A164867 615093669120,9226404633600,138396063456000,2075940861120000,
%U A164867 31139111556000000,467086652928000000,7006299487740014280
%N A164867 Number of reduced words of length n in Coxeter group on 16 generators S_i with relations (S_i)^2 = (S_i S_j)^8 = I.
%C A164867 The initial terms coincide with those of A170735, although the two sequences are eventually different.
%C A164867 Computed with MAGMA using commands similar to those used to compute A154638.
%H A164867 <a href="/index/Rec#order_08">Index entries for linear recurrences with constant coefficients</a>, signature (14, 14, 14, 14, 14, 14, 14, -105).
%F A164867 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)/(105*t^8 -
%F A164867 14*t^7 - 14*t^6 - 14*t^5 - 14*t^4 - 14*t^3 - 14*t^2 - 14*t + 1)
%t A164867 coxG[{8,105,-14}] (* The coxG program is at A169452 *) (* _Harvey P. Dale_, Mar 16 2015 *)
%K A164867 nonn
%O A164867 0,2
%A A164867 _John Cannon_ and _N. J. A. Sloane_, Dec 03 2009