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

0,7

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

Crossrefs

Sequence in context: A040187 A358890 A164811 * A070648 A040188 A322776

Adjacent sequences: A018810 A018811 A018812 * A018814 A018815 A018816

Keyword

nonn

Author

David W. Wilson

Status

approved