OFFSET
1,1
COMMENTS
Every 0 is next to 0 3's, every 1 is next to 1 4's, every 2 is next to 2 0's, every 3 is next to 3 2's, every 4 is next to 4 1's
Column 5 of A196653
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..220
EXAMPLE
Some solutions for n=4
..0..0..0..0..0....0..0..0..0..0....0..2..0..0..0....0..2..0..2..0
..2..2..2..2..0....0..0..1..2..0....0..1..0..0..2....2..2..0..2..0
..0..0..0..2..0....2..1..4..1..2....1..4..1..0..2....0..0..0..2..0
..2..0..0..2..0....0..0..1..0..0....0..1..0..0..0....0..0..0..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 04 2011
STATUS
approved