OFFSET
1,2
COMMENTS
Every 0 is next to 0 0's, every 1 is next to 1 0'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 A197250
EXAMPLE
All solutions containing all values 0 to 4 for n=4
..0..1..3..1....1..0..1..2....1..3..1..0....2..1..0..1
..1..4..1..0....3..1..4..1....0..1..4..1....1..4..1..3
..3..1..4..1....1..4..1..0....1..4..1..3....0..1..4..1
..1..0..1..2....0..1..3..1....2..1..0..1....1..3..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 12 2011
STATUS
approved