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 A140816 #5 Mar 30 2012 18:51:58 %S A140816 1,2,1,2,1,1,1,2,2,2,2,1,1,2,2,1,2,2,1,2,1,2,2,1,2,1,2,2,2,1,2,2,2,1, %T A140816 1,2,1,2,1,2,2,1,2,2,1,1,2,2,2,2,1,2,2,1,1,2,2,2,2,2,1,2,1,2,2,2,2,2, %U A140816 2,1,2,2,2,2,2,1,1,1,2,2,2,2,2,1,2,1,2,1,2,1,2,2,2,2,1,2,2,2,1,1,2,2,1,2,1 %N A140816 A third of digital roots of Bernoulli number denominators. %F A140816 a(n)= A010878(A140814(n))/ 3. %K A140816 nonn,base %O A140816 0,2 %A A140816 _Paul Curtz_, Jul 16 2008 %E A140816 Edited and extended by _R. J. Mathar_, Jul 29 2008