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 A139110 #3 Mar 30 2012 17:39:33 %S A139110 100,1001010,1001010111010,1001010111010111010, %T A139110 10010101110101110101110111110,1001010111010111010111011111010111110, %U A139110 1001010111010111010111011111010111110111010,1001010111010111010111011111010111110111010,10010101110101110101110111110101111101110101110111110,1001010111010111010111011111010111110111010111011111011111010,10010101110101110101110111110101111101110101110111110111110101111101110 %N A139110 Bisection of A139103. %Y A139110 Cf. A139103. %K A139110 nonn %O A139110 1,1 %A A139110 _Omar E. Pol_, Apr 08 2008 %E A139110 More terms from _R. J. Mathar_, May 22 2008