OFFSET
1,2
COMMENTS
Column 2 of A211888
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
..3.4.5....3.4.5....3.4.5....3.4.5....3.4.2....3.4.5....3.4.2....2.0.3
..6.7.3.1..2.6.7.0..6.7.2.1..6.1.3.7..5.6.4.7..6.7.1.0..5.6.7.0..4.5.6.7
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 24 2012
STATUS
approved