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A222954
Number of n X n 0..1 arrays with every row and column least squares fitting to a zero slope straight line, with a single point array taken as having zero slope.
0
2, 2, 16, 16, 512, 512, 323600, 144930, 1808243216, 615667968
OFFSET
1,1
EXAMPLE
Some solutions for n=4
..0..1..1..0....1..1..1..1....0..0..0..0....1..0..0..1....0..1..1..0
..1..1..1..1....1..0..0..1....1..1..1..1....0..1..1..0....1..0..0..1
..1..1..1..1....1..0..0..1....1..1..1..1....0..1..1..0....1..0..0..1
..0..1..1..0....1..1..1..1....0..0..0..0....1..0..0..1....0..1..1..0
CROSSREFS
Main diagonal of A222959.
Sequence in context: A193145 A352348 A133922 * A240033 A088139 A152556
KEYWORD
nonn,more
AUTHOR
R. H. Hardin, Mar 10 2013
STATUS
approved