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 A299035 #14 Feb 02 2018 06:53:19
%S A299035 1,1,21,23980,4896624249,327969374429859111,
%T A299035 11123496833223144303532943536,
%U A299035 273486179312859032380857823231575174373792,6620886635410516590847876477644821623913997428738363459941
%N A299035 a(n) = [x^n] Product_{k=1..n} 1/(1-k^k*x).
%H A299035 Seiichi Manyama, <a href="/A299035/b299035.txt">Table of n, a(n) for n = 0..26</a>
%F A299035 a(n) ~ n^(n^2). - _Vaclav Kotesovec_, Feb 02 2018
%t A299035 Table[SeriesCoefficient[Product[1/(1 - k^k*x), {k, 1, n}], {x, 0, n}], {n, 0, 10}] (* _Vaclav Kotesovec_, Feb 02 2018 *)
%Y A299035 Cf. A002109.
%Y A299035 Cf. A007820, A298851, A299036.
%K A299035 nonn
%O A299035 0,3
%A A299035 _Seiichi Manyama_, Feb 01 2018