OFFSET
1,2
COMMENTS
Column 3 of A222587
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..202
EXAMPLE
Some solutions for n=3
..0..0..0....0..0..0....0..1..1....0..0..0....0..0..0....0..0..0....0..0..0
..0..0..1....0..0..0....1..1..1....0..0..0....0..0..0....0..0..0....1..0..0
..0..0..0....0..0..0....1..1..1....0..0..1....0..1..0....1..0..0....0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 25 2013
STATUS
approved