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 A158809 #5 Mar 17 2014 04:14:13
%S A158809 1,-11,47,-55,-1187,935,134447,-81235,-10954907,11878163,4448228035,
%T A158809 -2674671175,-49823872264457,855605816351,40888881655769,
%U A158809 -368601472639675,-1711418530905656299,205700802920736299,1681258656184674548909,-144338957346266943535
%N A158809 Numerator of Bernoulli(n, -1/9).
%H A158809 Vincenzo Librandi, <a href="/A158809/b158809.txt">Table of n, a(n) for n = 0..250</a>
%t A158809 Table[Numerator[BernoulliB[n, -1/9]], {n, 0, 50}] (* _Vincenzo Librandi_, Mar 17 2014 *)
%Y A158809 For denominators see A158808.
%K A158809 sign,frac
%O A158809 0,2
%A A158809 _N. J. A. Sloane_, Nov 08 2009