A178272 Number of collinear point 7-tuples in an n X n .. X n 4-dimensional cubical grid.

0, 0, 0, 0, 0, 0, 2080, 26032, 172872, 813072, 3044712, 9667152, 27131344, 68725744, 160984560, 351148064, 725480624, 1421692128

Offset

1,7

Links

Table of n, a(n) for n=1..18.

Crossrefs

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

Sequence in context: A270537 A076581 A183675 * A194605 A233104 A071235

Adjacent sequences: A178269 A178270 A178271 * A178273 A178274 A178275

Keyword

nonn

Author

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

Status

approved