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 A169337 #12 May 10 2018 00:27:28
%S A169337 1,36,1260,44100,1543500,54022500,1890787500,66177562500,
%T A169337 2316214687500,81067514062500,2837362992187500,99307704726562500,
%U A169337 3475769665429687500,121651938290039062500,4257817840151367187500,149023624405297851562500
%N A169337 Number of reduced words of length n in Coxeter group on 36 generators S_i with relations (S_i)^2 = (S_i S_j)^30 = I.
%C A169337 The initial terms coincide with those of A170755, although the two sequences are eventually different.
%C A169337 First disagreement at index 30: a(30) = 21591150613366527513815807551145553588867186870, A170755(30) = 21591150613366527513815807551145553588867187500. - _Klaus Brockhaus_, Jun 23 2011
%C A169337 Computed with Magma using commands similar to those used to compute A154638.
%H A169337 <a href="/index/Rec#order_30">Index entries for linear recurrences with constant coefficients</a>, signature (34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, -595).
%F A169337 G.f.: (t^30 + 2*t^29 + 2*t^28 + 2*t^27 + 2*t^26 + 2*t^25 + 2*t^24 + 2*t^23 + 2*t^22 + 2*t^21 + 2*t^20 + 2*t^19 + 2*t^18 + 2*t^17 + 2*t^16 + 2*t^15 + 2*t^14 + 2*t^13 + 2*t^12 + 2*t^11 + 2*t^10 + 2*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 + 1)/(595*t^30 - 34*t^29 - 34*t^28 - 34*t^27 - 34*t^26 - 34*t^25 - 34*t^24 - 34*t^23 - 34*t^22 - 34*t^21 - 34*t^20 - 34*t^19 - 34*t^18 - 34*t^17 - 34*t^16 - 34*t^15 - 34*t^14 - 34*t^13 - 34*t^12 - 34*t^11 - 34*t^10 - 34*t^9 - 34*t^8 - 34*t^7 - 34*t^6 - 34*t^5 - 34*t^4 - 34*t^3 - 34*t^2 - 34*t + 1).
%t A169337 With[{num=Total[2t^Range[29]]+t^30+1,den=Total[-34 t^Range[29]]+595t^30+ 1},CoefficientList[Series[num/den,{t,0,20}],t]] (* _Harvey P. Dale_, Apr 12 2013 *)
%Y A169337 Cf. A170755 (G.f.: (1+x)/(1-35*x)).
%K A169337 nonn
%O A169337 0,2
%A A169337 _John Cannon_ and _N. J. A. Sloane_, Dec 03 2009