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A334713
Number of ways to select four points from an n X n grid so that three of them form a triangle of nonzero area and the extra point is on one of the edges of the triangle.
3
0, 0, 48, 532, 3088, 11340, 35264, 88088, 198912, 407744, 783344, 1388196, 2392592, 3889292, 6124032, 9394536, 14058816, 20345400, 29034288, 40356156, 55487952, 75207892, 100445632, 131773104, 171900864, 221418336, 282240816, 356468556, 447353616, 555069252, 686394560, 840316880, 1023123264, 1238261952
OFFSET
1,3
COMMENTS
Computed by Tom Duff, Jun 15 2020 - Jun 22 2020
CROSSREFS
The main diagonal of A334710.
Sequence in context: A233165 A247743 A189346 * A266210 A245953 A192832
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jun 15 2020
STATUS
approved