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 A304791 #4 May 18 2018 19:49:00
%S A304791 1,-2,-3,1,3,18,0,35,-27,-85,-91,-109,-366,118,942,-957,2791,2091,
%T A304791 4855,-1157,-6903,3341,3162,-37034,-46480,-89890,581,131275,-296935,
%U A304791 167543,108671,801491,616017,2441581,-307733,-1864550,4495872,1158228,-2589768,-767646,-21062537
%N A304791 Expansion of Product_{k>=1} (1 - prime(k)*x^k).
%C A304791 Convolution inverse of A145519.
%H A304791 <a href="/index/Par#part">Index entries for sequences related to partitions</a>
%F A304791 G.f.: Product_{k>=1} (1 - A000040(k)*x^k).
%t A304791 nmax = 40; CoefficientList[Series[Product[(1 - Prime[k] x^k), {k, 1, nmax}], {x, 0, nmax}], x]
%t A304791 a[n_] := a[n] = If[n == 0, 1, Sum[-Sum[d Prime[d]^(k/d), {d, Divisors[k]}] a[n - k], {k, 1, n}]/n]; Table[a[n], {n, 0, 40}]
%Y A304791 Cf. A000040, A007441, A145519, A147655, A298159.
%K A304791 sign
%O A304791 0,2
%A A304791 _Ilya Gutkovskiy_, May 18 2018