A222854 Number of n X n 0..1 arrays with every row and column least squares fitting to a nonnegative slope straight line, with a single point array taken as having zero slope

2, 6, 108, 2262, 452400, 113936464, 391515458264, 1332606996955912

Offset

1,1

Comments

Diagonal of A222862

Links

Table of n, a(n) for n=1..8.

Example

Some solutions for n=3
..1..0..1....0..1..0....0..1..0....0..0..1....0..1..0....0..0..1....0..0..0
..1..1..1....1..1..1....0..1..0....1..0..1....0..1..0....0..0..1....0..0..1
..1..0..1....0..1..0....0..1..0....1..0..1....0..1..1....1..0..1....0..0..0

Crossrefs

Sequence in context: A287935 A357090 A181036 * A351780 A059088 A216151

Adjacent sequences: A222851 A222852 A222853 * A222855 A222856 A222857

Keyword

nonn

Author

R. H. Hardin Mar 07 2013

Status

approved