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