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 A081050 #4 Mar 30 2012 18:58:43
%S A081050 1,0,5,5,74,154,2484,8028,149904,663696,14257440,80627040,1965444480,
%T A081050 13575738240,370643938560,3031488633600,91657072281600,
%U A081050 867718162483200,28779361764249600,309920046408806400,11185850044938240000
%N A081050 Generalized Stirling numbers of the first kind.
%F A081050 a(n) = s(n, 1) - (-1)^(n+1)*s(n, 2), s(n, m) = signed Stirling numbers of first kind a(n) = abs(n!*(1 + Sum {k=1..n, (-1)^n*1/k} ))
%Y A081050 Cf. A081049, A008275.
%K A081050 easy,nonn
%O A081050 0,3
%A A081050 _Paul Barry_, Mar 05 2003