A018813 Number of lines through exactly 6 points of an n X n grid of points.

0, 0, 0, 0, 0, 0, 14, 4, 4, 4, 4, 28, 60, 44, 20, 20, 88, 172, 272, 228, 168, 180, 284, 404, 540, 484, 628, 788, 964, 1276, 1620, 1612, 1588, 1548, 1492, 1420, 2072, 2484, 2928, 3404, 3912, 4788, 5728, 5852, 5960, 6052, 6692, 7364, 8068, 8004, 8520, 9468, 10464

Offset: 0

Author

David W. Wilson

Keywords

• nonn

Links

• Seiichi Manyama, Table of n, a(n) for n = 0..1000
• S. Mustonen, On lines and their intersection points in a rectangular grid of points