

A194191


Number of ways to arrange 6 indistinguishable points on an n X n square grid so that no three points are collinear at any angle.


3



0, 0, 2, 998, 36698, 620210, 5367308, 34678364, 169259212, 682686652, 2356999994, 7294368210, 20227526910, 52008171998, 124422857864, 279767468172, 596674510744, 1218556387684, 2385034544810, 4509309201242
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OFFSET

1,3


COMMENTS



LINKS



EXAMPLE

Some solutions for 4 X 4:
..1..0..1..0....0..1..1..0....1..0..0..1....0..1..0..0....0..1..0..1
..0..0..0..1....1..0..0..0....0..0..1..1....0..0..1..1....0..0..0..1
..0..1..0..0....0..1..1..0....0..0..0..0....0..0..1..0....0..0..1..0
..0..0..1..1....1..0..0..0....0..1..1..0....1..0..0..1....1..0..1..0


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



