OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..17
EXAMPLE
Some solutions for n=4:
..2..2..1..2....1..0..1..2....1..0..1..2....0..1..0..0....0..0..1..2
..1..0..1..0....1..0..1..0....1..2..2..1....0..0..1..0....1..2..1..0
..0..0..0..0....0..0..0..1....1..2..2..1....0..0..1..2....1..0..0..0
..1..0..1..2....1..0..0..1....1..2..2..1....0..0..1..0....1..0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 05 2013
STATUS
approved