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 A300549 #5 Mar 08 2018 21:17:54
%S A300549 1,2,4,4,10,4,28,4,36,14,44,4,284,4,60,64,202,4,616,4,732,88,92,4,
%T A300549 5740,22,108,112,1404,4,10672,4,1828,136,140,144,42622,4,156,160,
%U A300549 22940,4,28024,4,3420,3172,188,4,266524,30,4344,208,4764,4,58600,224,60204,232,236,4,3464272,4,252,6052,27338,264
%N A300549 a(n) = [x^n] Product_{d|n} (1 + x^d)/(1 - x^d).
%H A300549 <a href="/index/Par#part">Index entries for sequences related to partitions</a>
%F A300549 a(n) = 4 if n is a prime (A000040).
%t A300549 Table[SeriesCoefficient[Product[(1 + Boole[Mod[n, k] == 0] x^k)/(1 - Boole[Mod[n, k] == 0] x^k), {k, 1, n}], {x, 0, n}], {n, 0, 65}]
%Y A300549 Cf. A000040, A015128, A018818, A033630, A300547, A300548.
%K A300549 nonn
%O A300549 0,2
%A A300549 _Ilya Gutkovskiy_, Mar 08 2018