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 A207410 #11 Mar 31 2012 10:33:03 %S A207410 0,0,0,0,1,4,25,136,772,4953,35340,288335,2632792,26726855,296550560 %N A207410 Number of connected triangle-free graphs on n nodes with edge chromatic number 4. %Y A207410 Cf. A207408. %K A207410 nonn,more %O A207410 1,6 %A A207410 _Michael Sollami_, Feb 17 2012