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 A157818 #8 Mar 19 2014 05:45:39 %S A157818 1,4,48,64,3840,1024,86016,16384,983040,262144,34603008,4194304, %T A157818 22900899840,67108864,805306368,1073741824,1095216660480,17179869184, %U A157818 27419071217664,274877906944,181419418583040,4398046511104 %N A157818 Denominator of Bernoulli(n, 1/4). %H A157818 Vincenzo Librandi, <a href="/A157818/b157818.txt">Table of n, a(n) for n = 0..250</a> %t A157818 Denominator[BernoulliB[Range[0,30],1/4]] (* _Harvey P. Dale_, Nov 24 2012 *) %Y A157818 For numerators see A157817. %K A157818 nonn,frac %O A157818 0,2 %A A157818 _N. J. A. Sloane_, Nov 08 2009