OFFSET
1,3
COMMENTS
Diagonal of A196017
EXAMPLE
Some solutions for n=4
..2..3..2..2....2..3..2..0....0..2..3..2....0..2..2..2....2..2..3..2
..3..3..0..2....3..4..3..2....2..3..4..3....2..3..0..2....2..0..3..3
..3..4..3..2....2..3..0..2....2..0..3..2....3..4..3..2....2..3..4..3
..2..3..2..0....0..2..2..2....2..2..2..0....2..3..2..0....0..2..3..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 26 2011
STATUS
approved