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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. 2
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Computed by Tom Duff, Jun 15 2020 - Jun 22 2020

LINKS

Tom Duff, Table of n, a(n) for n = 1..192

Tom Duff, Data for tables A334708, A334709, A334710, A334711 for grids of size up to 192 X 192

CROSSREFS

The main diagonal of A334710.

Sequence in context: A233165 A247743 A189346 * A266210 A245953 A192832

Adjacent sequences:  A334710 A334711 A334712 * A334714 A334715 A334716

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Jun 15 2020

STATUS

approved

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Last modified May 12 10:54 EDT 2021. Contains 343821 sequences. (Running on oeis4.)