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 A158301 #6 Mar 19 2014 09:57:12
%S A158301 1,3,36,27,6480,972,326592,34992,8398080,1259712,665127936,45349632,
%T A158301 990435962880,1632586752,78364164096,58773123072,239794342133760,
%U A158301 2115832430592,13507474236899328,76169967501312,201088714203463680
%N A158301 Denominator of Bernoulli(n, -5/6).
%H A158301 Vincenzo Librandi, <a href="/A158301/b158301.txt">Table of n, a(n) for n = 0..250</a>
%t A158301 Table[Denominator[BernoulliB[n, -5/6]], {n, 0, 50}] (* _Vincenzo Librandi_, Mar 19 2014 *)
%Y A158301 For numerators see A158300.
%K A158301 nonn,frac
%O A158301 0,2
%A A158301 _N. J. A. Sloane_, Nov 08 2009