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 A163055 #7 Jul 03 2020 12:49:55
%S A163055 1,12,132,1452,15906,174240,1908720,20908800,229042770,2509019700,
%T A163055 27484733100,301077971700,3298119892650,36128829891000,
%U A163055 395768617233000,4335396381723000,47491541694374250,520239981289297500
%N A163055 Number of reduced words of length n in Coxeter group on 12 generators S_i with relations (S_i)^2 = (S_i S_j)^4 = I.
%C A163055 The initial terms coincide with those of A003954, although the two sequences are eventually different.
%C A163055 Computed with MAGMA using commands similar to those used to compute A154638.
%H A163055 <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (10, 10, 10, -55).
%F A163055 G.f.: (t^4 + 2*t^3 + 2*t^2 + 2*t + 1)/(55*t^4 - 10*t^3 - 10*t^2 - 10*t + 1)
%t A163055 coxG[{4,55,-10}] (* The coxG program is at A169452 *) (* _Harvey P. Dale_, Jul 03 2020 *)
%K A163055 nonn
%O A163055 0,2
%A A163055 _John Cannon_ and _N. J. A. Sloane_, Dec 03 2009