OFFSET
1,2
COMMENTS
Every 0 is next to 0 4's, every 1 is next to 1 1's, every 2 is next to 2 3's, every 3 is next to 3 2's, every 4 is next to 4 0's
Diagonal of A197199
EXAMPLE
Some solutions for n=4
..0..0..0..1....0..0..0..1....1..1..0..0....0..1..1..0....0..0..1..0
..1..1..0..1....0..0..0..1....0..0..0..0....1..0..0..0....1..0..1..0
..0..0..1..0....1..1..0..0....1..1..0..0....1..0..1..0....1..0..0..1
..0..0..1..0....0..0..1..1....0..0..0..0....0..0..1..0....0..0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 11 2011
STATUS
approved