A178261 Number of collinear point 9-tuples in an n X n cubical grid

0, 0, 0, 0, 0, 0, 0, 0, 20, 224, 1364, 5984, 21164, 64064, 172172, 420992, 952988, 2022672, 4065084, 7794240, 14346780, 25473360, 43815420, 73244160, 119362160, 190057520, 296373008

Offset

1,9

Links

Table of n, a(n) for n=1..27.

Crossrefs

Three collinear points in an n X n grid A000938 ; n X n X n grid A157882

Sequence in context: A155673 A000833 A302661 * A054329 A112503 A007160

Adjacent sequences: A178258 A178259 A178260 * A178262 A178263 A178264

Keyword

nonn

Author

R. H. Hardin, suggested by R. J. Mathar in the Sequence Fans Mailing List, May 24 2010

Status

approved