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 A199497 #7 Mar 31 2012 10:22:18 %S A199497 207,307,852135,2767769,5190544,1641843,105077952,30032270,548147655, %T A199497 1651035656,1878790553,4101044247,13027681441 %N A199497 Distances d=x^3-y^2 for positive good examples of Hall's conjecture: positive integers d < sqrt(x). %C A199497 For values x see A199496. %C A199497 For values y see A199498. %Y A199497 Cf. A078933, A199496, A199498. %K A199497 nonn,hard %O A199497 1,1 %A A199497 _Artur Jasinski_, Nov 07 2011