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A194192 Number of ways to arrange 7 indistinguishable points on an n X n square grid so that no three points are collinear at any angle. 3
0, 0, 0, 204, 26700, 1073076, 15657764, 159413700, 1108580092, 6030207624, 26852315940, 104865006648, 354993232192, 1098793355508, 3109294280324 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Column 7 of A194193.

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

Some solutions for 4 X 4:

..0..0..1..1....1..0..1..0....0..0..1..0....0..0..0..1....1..0..1..0

..0..0..0..1....0..0..0..1....0..0..1..1....1..0..1..0....0..1..0..0

..1..1..0..0....0..1..0..1....1..1..0..0....1..0..1..0....0..1..0..1

..0..1..1..0....0..1..1..0....0..1..0..1....0..1..0..1....1..0..1..0

CROSSREFS

Sequence in context: A099105 A253680 A209790 * A263505 A270605 A072573

Adjacent sequences:  A194189 A194190 A194191 * A194193 A194194 A194195

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 18 2011

STATUS

approved

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Last modified April 18 22:08 EDT 2019. Contains 322237 sequences. (Running on oeis4.)