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 A055104 #11 Mar 11 2019 15:55:39
%S A055104 1,1,2,3,4,6,8,10,13,16,20,24,29,34,41,47,55,63,73,82,94,105,119,132,
%T A055104 148,163,182,199,220,240,264,286,313,338,368,396,429,460,497,531,571,
%U A055104 609,653,694,742,787,839,888,944,997,1058,1115,1180,1242
%N A055104 Expansion of 1 + q/((1-q)*(1-q^2)) + q^2/((1-q)*(1-q^2)*(1-q^3)*(1-q^4)).
%C A055104 First 3 terms of a sum studied by Ramanujan.
%H A055104 Colin Barker, <a href="/A055104/b055104.txt">Table of n, a(n) for n = 0..1000</a>
%H A055104 G. E. Andrews, <a href="http://www.jstor.org/stable/2974472">Simplicity and surprise in Ramanujan's "Lost" Notebook</a>, Amer. Math. Monthly, 104 (No. 10, Dec. 1997), 918-925.
%H A055104 <a href="/index/Rec#order_10">Index entries for linear recurrences with constant coefficients</a>, signature (1,1,0,0,-2,0,0,1,1,-1).
%t A055104 LinearRecurrence[{1,1,0,0,-2,0,0,1,1,-1},{1,1,2,3,4,6,8,10,13,16,20},60] (* _Harvey P. Dale_, Mar 11 2019 *)
%o A055104 (PARI) Vec((1 - x^4 + x^5 - x^9 + x^10) / ((1 - x)^4*(1 + x)^2*(1 + x^2)*(1 + x + x^2)) + O(x^100)) \\ _Colin Barker_, Oct 02 2017
%K A055104 nonn,easy
%O A055104 0,3
%A A055104 _N. J. A. Sloane_, Jun 14 2000