Number of ways to select four points from an n X n grid so that three of them form a triangle of nonzero area and the extra point is on one of the edges of the triangle.

A334713

Number of ways to select four points from an n X n grid so that three of them form a triangle of nonzero area and the extra point is on one of the edges of the triangle.

Terms

    a(0) =0a(1) =0a(2) =48a(3) =532a(4) =3088a(5) =11340a(6) =35264a(7) =88088a(8) =198912a(9) =407744a(10) =783344a(11) =1388196a(12) =2392592a(13) =3889292a(14) =6124032a(15) =9394536a(16) =14058816a(17) =20345400a(18) =29034288a(19) =40356156a(20) =55487952a(21) =75207892a(22) =100445632a(23) =131773104a(24) =171900864a(25) =221418336a(26) =282240816a(27) =356468556a(28) =447353616a(29) =555069252

External references