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 A292935 #14 Dec 14 2019 19:23:52
%S A292935 1,-1,2,-5,15,-52,203,-877,4140,-21147,115975,-678570,4213597,
%T A292935 -27644437,190899322,-1382958545,10480142147,-82864869804,
%U A292935 682076806159,-5832742205057,51724158235372,-474869816156751,4506715738447323,-44152005855084346
%N A292935 E.g.f.: exp(exp(-x) - 1).
%H A292935 Seiichi Manyama, <a href="/A292935/b292935.txt">Table of n, a(n) for n = 0..576</a>
%F A292935 a(n) = (-1)^n * A000110(n).
%F A292935 G.f.: Sum_{k>=0} (-x)^k / Product_{j=1..k} (1 + j*x). - _Ilya Gutkovskiy_, Dec 14 2019
%o A292935 (PARI) x='x+O('x^66); Vec(serlaplace(exp(exp(-x)-1)))
%Y A292935 Column k=0 of A292948.
%Y A292935 Cf. A000110.
%K A292935 sign
%O A292935 0,3
%A A292935 _Seiichi Manyama_, Sep 27 2017