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 A098134 #3 Mar 31 2012 10:29:27 %S A098134 0,0,1,1,4,2,2,7,8,5,10,7,13,20,17,19 %N A098134 Number of triangles with corners on the integer lattice Z X Z (up to translations, rotations and reflections), the square of the longest side equal to A001481. %e A098134 a(3) = 1 because there is only 1 triangle on the integer lattice Z*Z where the square of the longest side is equal to A001481(3) = 4; its a triangle with sides 2, sqrt(2), sqrt(2). %K A098134 nonn %O A098134 0,5 %A A098134 _Franz Vrabec_, Sep 27 2004