A331780 One-half of the number of lines through at least 2 points of an n X n grid of points.

0, 0, 3, 10, 31, 70, 153, 268, 469, 746, 1153, 1648, 2361, 3230, 4415, 5784, 7473, 9450, 11963, 14772, 18255, 22194, 26793, 31824, 37837, 44474, 52187, 60516, 69983, 80318, 92233, 104972, 119525, 135294, 152739, 171240, 191685, 213510, 237915, 263640

Offset: 0

Author

N. J. A. Sloane, Feb 10 2020

Keywords

• nonn

Links

• M. A. Alekseyev, M. Basova, N. Yu. Zolotykh. On the minimal teaching sets of two-dimensional threshold functions. SIAM J. Disc. Math. 29(1), 2015, pp. 157-165.

Crossrefs

Equals A018808/2.