OFFSET
1,2
COMMENTS
Every 0 is next to 0 3's, every 1 is next to 1 3's, every 2 is next to 2 2's, every 3 is next to 3 1's, every 4 is next to 4 2's
Diagonal of A197342
EXAMPLE
Some solutions for n=4
..0..0..0..0....0..0..0..0....0..0..0..1....2..2..2..2....0..1..3..1
..2..2..2..0....2..2..0..1....1..0..1..3....2..0..0..2....1..0..1..0
..2..0..2..0....2..2..1..3....3..1..1..1....2..2..0..2....3..1..2..2
..2..2..2..0....0..0..0..1....1..1..3..1....0..2..2..2....1..0..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 13 2011
STATUS
approved