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A018813
Number of lines through exactly 6 points of an n X n grid of points.
2
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
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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
