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 A158077 #7 Mar 19 2014 06:21:46 %S A158077 1,3,36,108,6480,3888,326592,139968,8398080,5038848,665127936, %T A158077 181398528,990435962880,6530347008,78364164096,235092492288, %U A158077 239794342133760,8463329722368,13507474236899328,304679870005248,201088714203463680 %N A158077 Denominator of Bernoulli(n, 1/6). %H A158077 Vincenzo Librandi, <a href="/A158077/b158077.txt">Table of n, a(n) for n = 0..250</a> %t A158077 Denominator[BernoulliB[Range[0,20],1/6]] (* _Harvey P. Dale_, Jan 16 2013 *) %Y A158077 For numerators see A158073. %K A158077 nonn,frac %O A158077 0,2 %A A158077 _N. J. A. Sloane_, Nov 08 2009