a(n) is the number of distinct triangles whose sides do not pass through a grid point and whose vertices are three points of an n X n grid.

A372217

a(n) is the number of distinct triangles whose sides do not pass through a grid point and whose vertices are three points of an n X n grid.

Terms

    a(0) =0a(1) =1a(2) =3a(3) =8a(4) =14a(5) =36a(6) =48a(7) =100a(8) =146a(9) =232a(10) =294a(11) =502a(12) =595a(13) =938a(14) =1143a(15) =1433a(16) =1741a(17) =2512a(18) =2826a(19) =3911a(20) =4458a(21) =5319a(22) =6067a(23) =7976a(24) =8728a(25) =10750a(26) =12076a(27) =14194a(28) =15671a(29) =19510

External references