OFFSET
1,2
COMMENTS
Diagonal of A229586.
EXAMPLE
Some solutions for n=3:
0 1 2 0 1 0 0 1 0 0 1 2 0 1 2 0 1 0 0 1 0
0 2 1 2 0 2 1 2 0 2 0 1 0 1 2 2 2 1 2 2 1
1 0 1 2 1 0 1 2 1 2 1 0 0 2 0 1 2 1 1 0 2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 26 2013
STATUS
approved