OFFSET
1,1
COMMENTS
Every 0 is next to 0 3's, every 1 is next to 1 2's, every 2 is next to 2 0's, every 3 is next to 3 1's, every 4 is next to 4 4's
Column 7 of A196590
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..87
EXAMPLE
Some solutions for n=4
..0..0..0..1..0..2..0....0..0..0..1..0..1..0....0..0..0..1..2..0..2
..0..0..1..2..0..2..1....0..0..0..2..0..2..0....0..0..0..0..0..0..0
..0..0..0..0..0..0..0....0..0..2..2..0..1..0....0..0..0..0..2..2..2
..0..0..1..2..0..0..2....0..0..1..0..2..1..0....0..0..0..0..2..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 04 2011
STATUS
approved