A223588 Number of nX4 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

16, 18, 44, 56, 212, 316, 1788, 2878, 18844, 32116, 221652, 389110, 2759924, 4941976, 35665572, 64789396, 473517820, 869692952, 6418702132, 11892204000, 88460921156, 165061640176, 1235762853852, 2319452444592, 17458919011636

Offset

1,1

Comments

Column 4 of A223592

Links

R. H. Hardin, Table of n, a(n) for n = 1..63

Example

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

Crossrefs

Sequence in context: A335248 A308222 A278471 * A358423 A183401 A300142

Adjacent sequences: A223585 A223586 A223587 * A223589 A223590 A223591

Keyword

nonn

Author

R. H. Hardin Mar 22 2013

Status

approved