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A018813 Number of lines through exactly 6 points of an n X n grid of points. 0
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,7

LINKS

Table of n, a(n) for n=0..52.

CROSSREFS

Sequence in context: A182440 A040187 A164811 * A070648 A040188 A040186

Adjacent sequences:  A018810 A018811 A018812 * A018814 A018815 A018816

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified May 23 07:10 EDT 2013. Contains 225585 sequences.