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 A285445 #7 Apr 19 2017 09:41:05
%S A285445 1,1,1,3,3,4,8,9,11,19,22,27,42,49,60,87,102,124,172,202,244,326,383,
%T A285445 460,598,702,838,1066,1249,1483,1854,2167,2560,3154,3677,4324,5264,
%U A285445 6120,7165,8633,10009,11671,13939,16116,18720,22188,25583,29611,34862,40089
%N A285445 Expansion of Product_{k>=1} (1 + x^k) / (1 - x^(3*k)).
%H A285445 Vaclav Kotesovec, <a href="/A285445/b285445.txt">Table of n, a(n) for n = 0..1000</a>
%F A285445 a(n) ~ exp(sqrt(5*n)*Pi/3) * sqrt(5) / (8*sqrt(3)*n).
%t A285445 nmax = 50; CoefficientList[Series[Product[((1+x^k)/(1-x^(3*k))), {k, 1, nmax}], {x, 0, nmax}], x]
%Y A285445 Cf. A266648, A285446.
%K A285445 nonn
%O A285445 0,4
%A A285445 _Vaclav Kotesovec_, Apr 19 2017