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 A090810 #2 Mar 30 2012 17:30:56
%S A090810 1,5,7,11,23,47,55,59,83,85,107,115,133,145,167,179,227,235,239,253,
%T A090810 263,265,295,301,347,359,383,413,415,443,455,467,479,503,517,535,553,
%U A090810 563,581,587,647,649,659,685,719,721,745,749,781,827,835,839,863,865,887
%N A090810 Distinct numbers appearing as denominators of Bernoulli(2n) for n > 2, divided by 6.
%F A090810 A090801(n)/6 for n>2.
%t A090810 Take[ Union[ Table[ Denominator[ BernoulliB[2n]], {n, 1, 500}]], 60]/6
%K A090810 nonn
%O A090810 1,2
%A A090810 _Robert G. Wilson v_, Feb 10 2004