A222958 Number of nX7 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

20, 20, 400, 400, 8000, 8000, 323600, 215892, 14843920, 9734400, 1138729280, 631004724, 117308595520, 59768363024, 14742894291200, 7399937947392, 2167430898315280, 1074761911462928, 361218009407664960

Offset

1,1

Comments

Column 7 of A222959

Links

Table of n, a(n) for n=1..19.

Example

Some solutions for n=4
..1..1..1..0..1..1..1....0..0..1..0..1..0..0....0..1..1..1..0..0..1
..0..0..1..1..1..0..0....0..1..1..0..0..0..1....0..0..1..1..1..0..0
..0..0..1..1..1..0..0....0..1..1..0..0..0..1....0..0..1..1..1..0..0
..1..1..1..0..1..1..1....0..0..1..0..1..0..0....0..1..1..1..0..0..1

Crossrefs

Sequence in context: A022354 A302363 A165841 * A355312 A212284 A091235

Adjacent sequences: A222955 A222956 A222957 * A222959 A222960 A222961

Keyword

nonn

Author

R. H. Hardin Mar 10 2013

Status

approved