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 A086934 #11 Jan 13 2017 01:14:54
%S A086934 0,-1,-1,0,6,34,150,548,1064,-9620,-190980,-2379408,-26412408,
%T A086934 -281137848,-2923819080,-29496805392,-277842087360,-2151448802448,
%U A086934 -5085750338064,334794720634752,11987850975483360
%N A086934 E.g.f.: (sqrt(Pi)/2)*erf(log(1-x)).
%H A086934 G. C. Greubel, <a href="/A086934/b086934.txt">Table of n, a(n) for n = 0..450</a>
%F A086934 Sum_{k=0..floor((n-1)/2)} (-1)^(n-k)*Stirling1(n, 2*k+1)*(2*k)!/(k)!.
%t A086934 With[{nn=20},CoefficientList[Series[Sqrt[Pi]/2 Erf[Log[1-x]],{x,0,nn}],x] Range[0,nn]!] (* _Harvey P. Dale_, Mar 04 2015 *)
%Y A086934 Cf. A009199.
%K A086934 sign
%O A086934 0,5
%A A086934 _Vladeta Jovovic_, Sep 21 2003
%E A086934 Definition clarified by _Harvey P. Dale_, Mar 04 2015