OFFSET
1,3
COMMENTS
Column 3 of A212044
EXAMPLE
Some solutions for n=4
..0........0........0........0........0........0........0........0
..1.2......1.2......1.2......1.2......1.2......1.2......1.2......1.2
..3.0.4....3.4.5....3.4.1....3.4.0....3.0.4....3.4.5....3.4.5....3.0.4
..5.6.2.5..0.6.7.3..5.0.6.4..5.6.7.2..5.6.3.0..6.0.1.3..0.6.7.1..2.1.5.6
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 28 2012
STATUS
approved