OFFSET
1,2
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..61
EXAMPLE
Some solutions for n=8
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
..1....1....1....1....1....0....1....1....1....1....1....1....0....1....1....0
..2....2....0....1....1....1....1....0....0....1....0....1....1....1....2....1
..0....0....0....1....0....2....2....2....1....1....0....0....1....2....1....1
..1....0....0....2....2....0....2....1....2....2....2....0....1....2....0....2
..1....2....2....3....0....0....1....3....0....1....0....2....2....1....0....1
..1....0....2....0....0....0....0....1....1....0....3....2....0....2....3....3
..1....1....2....2....3....3....1....2....3....2....2....0....2....2....0....1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jul 15 2011
STATUS
approved