OFFSET
1,2
COMMENTS
Every 0 is next to 0 4's, every 1 is next to 1 2's, every 2 is next to 2 2's, every 3 is next to 3 0's, every 4 is next to 4 2's
Column 7 of A197648
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..109
EXAMPLE
Some solutions containing all values 0 to 4 for n=4
..0..0..0..0..2..2..2....0..0..3..0..2..2..2....0..0..0..1..2..2..2
..0..3..0..0..2..4..2....0..3..0..1..2..4..2....0..0..3..0..2..4..2
..2..2..0..1..2..2..2....0..3..0..1..2..2..2....2..2..1..1..2..2..2
..2..2..0..0..1..0..0....0..0..0..0..1..0..1....2..2..1..0..0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 16 2011
STATUS
approved