OFFSET
1,1
COMMENTS
Every 0 is next to 0 2's, every 1 is next to 1 1's, every 2 is next to 2 1's, every 3 is next to 3 0's, every 4 is next to 4 0's
Column 7 of A197450
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..158
EXAMPLE
Some solutions containing all values 0 to 4 for n=4
..0..0..3..0..0..3..0....0..0..3..0..0..0..0....0..0..0..0..1..1..0
..0..3..0..0..4..0..1....1..0..0..4..0..3..1....1..3..0..4..0..0..1
..0..3..0..0..0..0..1....1..0..3..0..0..0..1....1..0..0..0..3..0..1
..0..0..3..0..1..1..2....2..1..1..0..3..0..0....0..0..3..0..1..1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 15 2011
STATUS
approved