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 A050394 #13 Nov 08 2015 08:50:30
%S A050394 1,-1,1,3,-38,234,-586,-9493,194906,-1981880,4724642,301409600,
%T A050394 -7840250579,102256372812,-9254171165,-39936103724491,
%U A050394 1199830608004118,-17733202003472076,-96125957089130420
%N A050394 Exponential reversion of partitions into distinct parts A000009.
%H A050394 N. J. A. Sloane, <a href="/transforms.txt">Transforms</a>
%H A050394 <a href="/index/Res#revert">Index entries for reversions of series</a>
%t A050394 length = 20; Range[length]! InverseSeries[Sum[PartitionsQ[n] x^n/n!, {n, 1, length}] + O[x]^(length+1)][[3]] (* _Vladimir Reshetnikov_, Nov 07 2015 *)
%Y A050394 Cf. A050393.
%K A050394 sign
%O A050394 1,4
%A A050394 _Christian G. Bower_, Nov 15 1999