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A018814
Number of lines through exactly 7 points of an n X n grid of points.
1
0, 0, 0, 0, 0, 0, 0, 16, 4, 4, 4, 4, 4, 32, 68, 48, 20, 20, 20, 100, 196, 308, 252, 180, 92, 196, 316, 452, 604, 532, 444, 596, 764, 1084, 1436, 1820, 1644, 1588, 1516, 1428, 1324, 1540, 1772, 2196, 2652, 3140, 3660, 4212, 4796, 6012, 6084, 6140, 6180, 6204, 6212
OFFSET
0,8
CROSSREFS
Sequence in context: A075462 A082959 A232014 * A307407 A234288 A177499
KEYWORD
nonn
STATUS
approved