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 A294341 #8 Oct 29 2017 11:09:20
%S A294341 1,-1,0,2,-2,18,-128,740,-3204,-6076,210304,-1097064,-29284760,
%T A294341 398231768,792490752,-124480674448,1471405254928,-2684728872720,
%U A294341 -64686947480576,-626709774748384,-10524779012515104,689522178752789024,34910956277827256320
%N A294341 E.g.f.: exp(Sum_{n>=1} A010815(n)*x^n/n).
%H A294341 Seiichi Manyama, <a href="/A294341/b294341.txt">Table of n, a(n) for n = 0..451</a>
%F A294341 a(0) = 1 and a(n) = (n-1)! * Sum_{k=1..n} A010815(k)*a(n-k)/(n-k)! for n > 0.
%Y A294341 Cf. A294260.
%K A294341 sign
%O A294341 0,4
%A A294341 _Seiichi Manyama_, Oct 28 2017