OFFSET
1,2
COMMENTS
Diagonal of A212930
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..13
EXAMPLE
Some solutions for n=3
..0..0..1....2..2..0....0..1..2....1..0..1....1..1..1....2..1..2....1..2..1
..1..2..0....1..2..0....1..2..0....1..2..2....1..0..1....1..2..2....2..1..2
..1..2..1....2..1..0....0..0..0....2..1..2....2..1..2....1..2..0....1..0..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin May 31 2012
STATUS
approved