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 A287706 #6 Aug 08 2017 11:50:45 %S A287706 1,2,4,8,16,96,64,384,256,2560,1024,6144,4096,860160,81920,98304, %T A287706 65536,1966080,1310720,55050240,7340032,346030080,20971520,125829120, %U A287706 16777216,9160359936,469762048,134217728,268435456,8053063680,1073741824,496068722688,330712481792 %N A287706 a(n) = denominator(Bernoulli(n, x/2) - Bernoulli(n, x)). %p A287706 a := n -> denom(bernoulli(n, x/2)-bernoulli(n, x)): seq(a(i), i=0..32); %Y A287706 Cf. A195441, A224783, A287705, A290645. %K A287706 nonn %O A287706 0,2 %A A287706 _Peter Luschny_, Aug 08 2017