OFFSET
1,1
COMMENTS
Column 4 of A222456
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..204
EXAMPLE
Some solutions for n=4
..0..0..1..1....0..0..0..0....0..0..1..1....0..0..0..0....0..0..0..0
..0..0..1..1....0..0..0..0....0..0..1..1....1..1..0..0....0..0..0..0
..0..0..1..1....1..1..1..1....0..0..0..0....0..0..0..0....1..1..0..0
..0..0..1..1....1..1..1..1....0..0..0..0....0..0..0..0....1..1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 20 2013
STATUS
approved