OFFSET
1,2
COMMENTS
Column 2 of A216663
EXAMPLE
Some solutions for n=3
..0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1
..2..3....2..3....2..0....1..2....1..0....2..0....2..3....2..0....2..3....2..3
..0..2....4..1....0..2....0..3....2..3....0..1....3..1....3..1....0..4....3..4
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 13 2012
STATUS
approved