OFFSET
1,2
COMMENTS
Column 7 of A268079.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=3
..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0
..0..0..0..1..0..0..0....0..1..1..1..0..1..1....0..0..0..0..0..1..1
..0..0..1..0..0..0..1....0..0..0..0..0..0..0....0..0..0..0..1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 25 2016
STATUS
approved