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 A158654 #6 Mar 19 2014 09:57:27
%S A158654 1,8,192,512,61440,32768,5505024,2097152,251658240,134217728,
%T A158654 35433480192,8589934592,93802085744640,549755813888,13194139533312,
%U A158654 35184372088832,71776119061217280,2251799813685248,7187745005283311616
%N A158654 Denominator of Bernoulli(n, 1/8).
%H A158654 Vincenzo Librandi, <a href="/A158654/b158654.txt">Table of n, a(n) for n = 0..250</a>
%t A158654 Table[Denominator[BernoulliB[n, 1/8]], {n, 0, 50}] (* _Vincenzo Librandi_, Mar 19 2014 *)
%Y A158654 For numerators see A158653.
%K A158654 nonn,frac
%O A158654 0,2
%A A158654 _N. J. A. Sloane_, Nov 08 2009