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 A165308 #8 Aug 14 2021 11:43:39
%S A165308 1,16,240,3600,54000,810000,12150000,182250000,2733750000,41006249880,
%T A165308 615093746400,9226406169120,138396092133600,2075941375956000,
%U A165308 31139120548620000,467086806868500000,7006302082615500000
%N A165308 Number of reduced words of length n in Coxeter group on 16 generators S_i with relations (S_i)^2 = (S_i S_j)^9 = I.
%C A165308 The initial terms coincide with those of A170735, although the two sequences are eventually different.
%C A165308 Computed with MAGMA using commands similar to those used to compute A154638.
%H A165308 <a href="/index/Rec#order_09">Index entries for linear recurrences with constant coefficients</a>, signature (14, 14, 14, 14, 14, 14, 14, 14, -105).
%F A165308 G.f. (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 +
%F A165308 1)/(105*t^9 - 14*t^8 - 14*t^7 - 14*t^6 - 14*t^5 - 14*t^4 - 14*t^3 -
%F A165308 14*t^2 - 14*t + 1)
%t A165308 coxG[{9,105,-14}] (* The coxG program is at A169452 *) (* _Harvey P. Dale_, Aug 14 2021 *)
%K A165308 nonn
%O A165308 0,2
%A A165308 _John Cannon_ and _N. J. A. Sloane_, Dec 03 2009