login
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
0
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
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 * A374170 A355312 A212284
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 10 2013
STATUS
approved