Number of ways to place 3 points on an n X n square grid so that no more than 2 points are on a vertical or horizontal straight line.

A279437

Number of ways to place 3 points on an n X n square grid so that no more than 2 points are on a vertical or horizontal straight line.

Terms

    a(0) =0a(1) =4a(2) =78a(3) =528a(4) =2200a(5) =6900a(6) =17934a(7) =40768a(8) =83808a(9) =159300a(10) =284350a(11) =482064a(12) =782808a(13) =1225588a(14) =1859550a(15) =2745600a(16) =3958144a(17) =5586948a(18) =7739118a(19) =10541200a(20) =14141400a(21) =18711924a(22) =24451438a(23) =31587648a(24) =40380000a(25) =51122500a(26) =64146654a(27) =79824528a(28) =98571928a(29) =120851700

External references