(1/4) * number of ways to select 3 distinct points forming a triangle of unsigned area = n/2 from a square of grid points with side length n.

A320310

(1/4) * number of ways to select 3 distinct points forming a triangle of unsigned area = n/2 from a square of grid points with side length n.

Terms

    a(0) =1a(1) =8a(2) =23a(3) =82a(4) =114a(5) =416a(6) =373a(7) =1149a(8) =1351a(9) =2598a(10) =2113a(11) =7158a(12) =4094a(13) =9344a(14) =11528a(15) =18243a(16) =11882a(17) =33006a(18) =18603a(19) =48760a(20) =42102a(21) =54312a(22) =40061a(23) =121728a(24) =68115a(25) =105204a(26) =112546a(27) =178322a(28) =101798a(29) =284980

External references