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 A267005 #5 Jan 08 2016 12:51:49
%S A267005 1,0,-1,-2,-4,-2,-5,6,7,18,31,50,17,34,39,-122,-134,-296,-298,-556,
%T A267005 -670,-692,64,26,1119,1054,3953,6804,6645,9250,8644,9702,2817,11386,
%U A267005 -12415,-36382,-47757,-71782,-122506,-99540,-191083,-176382,-253722,-166706,-21024
%N A267005 Expansion of Product_{k>=1} ((1 - k*x^k) / (1 - x^k)).
%C A267005 Convolution of A022661 and A000041.
%H A267005 Vaclav Kotesovec, <a href="/A267005/b267005.txt">Table of n, a(n) for n = 0..10000</a>
%t A267005 nmax = 50; CoefficientList[Series[Product[(1-k*x^k)/(1-x^k), {k, 1, nmax}], {x, 0, nmax}], x]
%Y A267005 Cf. A000041, A022661, A267004.
%K A267005 sign
%O A267005 0,4
%A A267005 _Vaclav Kotesovec_, Jan 08 2016