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 A158941 #5 Mar 17 2014 08:17:11
%S A158941 1,-13,71,-143,2653,715,51791,-127127,-2336027,18133687,1003761955,
%T A158941 -4095513851,-11278364798537,1310672279059,9265565367737,
%U A158941 -564709715670815,-387913689686252779,315149059876453231,381102197981560974797,-221139612243122878019
%N A158941 Numerator of Bernoulli(n, -2/9).
%H A158941 Vincenzo Librandi, <a href="/A158941/b158941.txt">Table of n, a(n) for n = 0..250</a>
%t A158941 Table[Numerator[BernoulliB[n, -2/9]], {n, 0, 50}] (* _Vincenzo Librandi_, Mar 17 2014 *)
%Y A158941 For denominators see A158808.
%K A158941 sign,frac
%O A158941 0,2
%A A158941 _N. J. A. Sloane_, Nov 08 2009