OFFSET
1,2
COMMENTS
Every 0 is next to 0 3's, every 1 is next to 1 0's, every 2 is next to 2 4's, every 3 is next to 3 1's, every 4 is next to 4 2's
Diagonal of A196146
EXAMPLE
Some solutions for n=4
.1.3.1.0...0.1.3.1...1.3.1.0...0.0.1.1...0.1.1.0
.0.1.1.0...0.1.1.0...0.1.1.0...1.1.1.0...1.1.1.1
.1.1.1.1...0.1.1.0...0.1.1.1...3.1.1.0...1.0.0.1
.1.0.0.1...1.3.1.0...1.1.0.1...1.0.1.1...1.0.0.1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 28 2011
STATUS
approved