Number of scalene triangles on an n X n grid (or geoboard).

Terms

a(0) =0a(1) =0a(2) =40a(3) =368a(4) =1704a(5) =5704a(6) =15400a(7) =36096a(8) =75632a(9) =145968a(10) =263592a(11) =451392a(12) =738360a(13) =1163552a(14) =1774840a(15) =2632344a(16) =3808992a(17) =5394752a(18) =7493936a(19) =10233832a(20) =13759008a(21) =18241312a(22) =23877984a(23) =30896984a(24) =39551456a(25) =50137240a(26) =62983128a(27) =78459880