A178261 - OEIS

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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

(list; graph; refs; listen; history; text; internal format)

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