Number of acute isosceles triangles on an n X n grid.

Terms

a(0) =0a(1) =0a(2) =8a(3) =48a(4) =164a(5) =448a(6) =976a(7) =1864a(8) =3328a(9) =5512a(10) =8640a(11) =12984a(12) =18836a(13) =26576a(14) =36584a(15) =49056a(16) =64560a(17) =83640a(18) =106904a(19) =134816a(20) =168004a(21) =206952a(22) =252480a(23) =305360a(24) =366312a(25) =436120a(26) =515864a(27) =605928a(28) =707644a(29) =822120