OFFSET
1,1
COMMENTS
Every 0 is next to 0 3's, every 1 is next to 1 0's, every 2 is next to 2 1's, every 3 is next to 3 2's, every 4 is next to 4 4's
Column 6 of A196218
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..151
EXAMPLE
Some solutions for n=4
..1..1..0..1..1..2....0..0..1..1..0..1....1..0..1..1..0..1....0..0..1..2..0..1
..0..2..1..2..0..1....1..1..1..2..0..1....2..0..2..2..1..1....0..0..1..1..0..2
..0..2..1..0..0..1....1..1..0..0..0..1....1..0..1..3..2..0....0..0..1..1..2..1
..0..1..2..0..0..1....0..2..1..2..1..2....1..0..1..2..1..0....1..1..2..0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 29 2011
STATUS
approved