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 A298987 #11 Feb 02 2018 10:09:24
%S A298987 1,1,4,27,80,400,1908,6223,31296,116478,450100,1828915,7360848,
%T A298987 26906828,95776772,403908975,1421758720,5072014447,18481180644,
%U A298987 68350964211,246180936400,827642046294,2958748580084,10294629775620,36607347335232,120800714172500,407951731319860,1405943613730899
%N A298987 a(n) = [x^n] Product_{k>=1} (1 + n*x^k)^k.
%H A298987 Vaclav Kotesovec, <a href="/A298987/b298987.txt">Table of n, a(n) for n = 0..1000</a>
%t A298987 Table[SeriesCoefficient[Product[(1 + n x^k)^k, {k, 1, n}], {x, 0, n}], {n, 0, 27}]
%Y A298987 Cf. A026007, A261562, A266857, A266891, A291698, A297322, A298985, A298986, A298988.
%K A298987 nonn
%O A298987 0,3
%A A298987 _Ilya Gutkovskiy_, Jan 31 2018