OFFSET
1,1
COMMENTS
Column 4 of A227025
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..37
EXAMPLE
Some solutions for n=4
..0..0..1..1....0..0..1..1....0..0..0..1....0..0..0..0....0..0..0..1
..0..1..0..0....0..1..0..0....0..0..1..0....0..0..1..0....0..0..0..2
..2..0..0..0....1..1..0..1....0..1..0..0....0..2..0..0....0..0..0..2
..2..0..0..1....0..0..2..2....0..2..0..0....1..0..1..0....0..0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jun 27 2013
STATUS
approved