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 A108921 #6 Mar 30 2012 18:54:36 %S A108921 1,1,1,2,0,0,0,2,1,2,0,1,0,0,1,1,2,2,1,0,1,0,1,1,2,2,1,2,0,1,0,1,2,0, %T A108921 1,2,1 %N A108921 A083350 read mod 3. %H A108921 N. Heninger, E. M. Rains and N. J. A. Sloane, <a href="http://arXiv.org/abs/math.NT/0509316">On the Integrality of n-th Roots of Generating Functions</a>, J. Combinatorial Theory, Series A, 113 (2006), 1732-1745. %K A108921 nonn %O A108921 0,4 %A A108921 _N. J. A. Sloane_ and _Nadia Heninger_, Jul 22 2005