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A222897
Number of n X n 0..1 arrays with successive rows and columns fitting to straight lines with strictly increasing slope, with a single point array taken as having zero slope
0
2, 5, 8, 251, 1872, 720452, 33675352
OFFSET
1,1
COMMENTS
Diagonal of A222898
EXAMPLE
Some solutions for n=4
..1..1..0..0....1..1..0..0....1..0..0..0....1..1..0..0....1..1..0..0
..0..0..0..0....1..0..0..0....0..0..0..0....0..1..0..0....1..0..0..0
..0..1..0..1....0..1..1..0....1..0..1..1....0..0..0..0....1..1..0..1
..0..1..1..1....0..0..0..1....0..0..0..1....0..1..0..1....0..1..1..1
CROSSREFS
Sequence in context: A061354 A162709 A242875 * A282455 A323457 A011039
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 08 2013
STATUS
approved