OFFSET
1,3
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..15
EXAMPLE
Some solutions for 4X4
..0..1..0..1....0..1..3..0....0..1..3..1....0..1..2..0....0..1..3..1
..1..2..1..3....1..2..0..2....1..2..1..3....1..2..3..2....1..2..1..3
..0..1..0..2....3..0..3..0....3..1..0..2....2..3..2..3....3..1..2..1
..1..3..2..1....0..2..0..3....1..3..2..3....0..2..3..0....1..3..1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jul 22 2011
STATUS
approved