%I
%S 0,0,1,1,4,2,2,7,8,5,10,7,13,20,17,19
%N 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 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 nonn
%O 0,5
%A _Franz Vrabec_, Sep 27 2004
