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 A158966 #6 Mar 17 2014 07:46:21
%S A158966 1,-19,167,-665,46813,-28595,2200847,-942305,69637093,-37919231,
%T A158966 -1583934365,454005475,65901450175543,-483633563387,-49846844511751,
%U A158966 195284370031975,2100079369556583701,-109471609351004663,-2062327986071160493171,76800003085530485995
%N A158966 Numerator of Bernoulli(n, -5/9).
%H A158966 Vincenzo Librandi, <a href="/A158966/b158966.txt">Table of n, a(n) for n = 0..250</a>
%t A158966 Table[Numerator[BernoulliB[n, -5/9]], {n, 0, 50}] (* _Vincenzo Librandi_, Mar 17 2014 *)
%Y A158966 For denominators see A158808.
%K A158966 sign,frac
%O A158966 0,2
%A A158966 _N. J. A. Sloane_, Nov 08 2009