OFFSET
1,1
COMMENTS
Every 0 is next to 0 4's, every 1 is next to 1 0's, every 2 is next to 2 2's, every 3 is next to 3 1's, every 4 is next to 4 3's
Column 7 of A196718
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..44
EXAMPLE
Some solutions for n=4
..0..2..2..0..1..1..0....0..0..0..0..1..1..0....0..0..0..0..0..0..0
..1..2..2..0..2..2..0....1..2..2..2..2..1..1....0..2..2..1..1..1..1
..1..0..1..1..2..2..0....1..2..1..0..2..0..1....0..2..2..1..3..3..1
..1..0..1..3..1..0..0....0..2..2..2..2..0..1....1..1..0..0..1..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 05 2011
STATUS
approved