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 A158990 #6 Mar 17 2014 07:46:45
%S A158990 1,-25,299,-1700,182773,-185300,24906299,-16433900,1498993813,
%T A158990 -1370832740,270199327495,-103625769500,794394899339023,
%U A158990 -8895784594580,179427346755293,-225134806359500,-850105102171073419,-248766474357466820,1778293213755999212633,141258495201145524100
%N A158990 Numerator of Bernoulli(n, -8/9).
%H A158990 Vincenzo Librandi, <a href="/A158990/b158990.txt">Table of n, a(n) for n = 0..250</a>
%t A158990 Table[Numerator[BernoulliB[n, -8/9]], {n, 0, 50}] (* _Vincenzo Librandi_, Mar 17 2014 *)
%Y A158990 For denominators see A158808.
%K A158990 sign,frac
%O A158990 0,2
%A A158990 _N. J. A. Sloane_, Nov 08 2009