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 A158073 #5 Mar 16 2014 14:25:58
%S A158073 1,-1,1,5,-91,-85,3751,3185,-138811,-207913,25143755,20824925,
%T A158073 -125284471321,-2961364861,45706820257,567040692425,-850303535348267,
%U A158073 -140642298254929,371258049560506117,43861384856264885,-53200355263894712681,-16798626454194814117
%N A158073 Numerator of Bernoulli(n, 1/6).
%H A158073 Vincenzo Librandi, <a href="/A158073/b158073.txt">Table of n, a(n) for n = 0..250</a>
%t A158073 Table[Numerator[BernoulliB[n, 1/6]], {n, 0, 50}] (* _Vincenzo Librandi_, Mar 16 2014 *)
%Y A158073 For denominators see A158077.
%K A158073 sign,frac
%O A158073 0,4
%A A158073 _N. J. A. Sloane_, Nov 08 2009