A223586 Number of n X n 0..1 arrays with every row having the same least squares slope fit to a straight line, and every column the same least squares slope fit to a straight line, with a single point array taken as having zero slope

2, 6, 32, 56, 1664, 2352, 1123232, 929038, 9405893184

Offset

1,1

Comments

Diagonal of A223592

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Sequence in context: A190958 A340232 A109243 * A212762 A108327 A188573

Adjacent sequences: A223583 A223584 A223585 * A223587 A223588 A223589

Keyword

nonn

Author

R. H. Hardin Mar 22 2013

Status

approved