OFFSET
1,1
COMMENTS
Every 0 is next to 0 3's, every 1 is next to 1 1's, every 2 is next to 2 2's, every 3 is next to 3 4's, every 4 is next to 4 0's
Column 6 of A197079
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=4
..0..0..0..0..2..2....1..0..1..1..0..0....2..2..0..0..1..1....0..0..0..0..0..0
..1..2..2..0..2..2....1..0..0..0..4..0....2..2..0..0..0..0....2..2..0..4..0..0
..1..2..2..0..0..1....0..0..0..0..0..1....0..0..4..0..4..0....2..2..0..0..1..1
..0..0..1..1..0..1....0..0..1..1..0..1....0..0..0..0..0..0....1..1..0..0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 09 2011
STATUS
approved