OFFSET
1,1
COMMENTS
Row 4 of A234068
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..81
EXAMPLE
Some solutions for n=1
..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0
..0..0..0....0..0..0....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..0....1..0..0....1..0..0
..0..0..1....1..2..0....1..3..0....0..0..3....0..2..2....1..0..3....1..0..1
..3..0..1....1..1..1....1..3..2....2..3..1....1..0..2....1..1..0....3..0..1
..0..3..1....1..0..3....2..1..1....2..1..0....3..3..1....1..0..2....1..3..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 19 2013
STATUS
approved