OFFSET
1,3
COMMENTS
Every 0 is next to 0 3's, every 1 is next to 1 3's, every 2 is next to 2 1's, every 3 is next to 3 1's, every 4 is next to 4 1's
Diagonal of A197401
EXAMPLE
Some solutions containing all values 0 to 4 for n=4
..1..3..1..1....0..0..2..1....1..3..1..1....1..0..2..1....0..0..0..1
..2..1..1..3....0..0..1..3....2..1..1..3....3..1..1..3....0..0..1..3
..0..1..4..1....2..1..4..1....2..1..4..1....1..4..1..1....0..1..4..1
..1..3..1..0....1..3..1..2....1..3..1..0....0..1..3..1....1..3..1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 14 2011
STATUS
approved