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.

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

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

Author

N. J. A. Sloane, Jun 15 2020

Status

approved