OFFSET
1,4
COMMENTS
Column 6 of A211930
EXAMPLE
Some solutions for n=4
..0........0........0........0........0........0........0........0
..1.2......1.2......1.0......1.2......1.2......1.2......1.2......1.2
..3.1.3....0.3.2....2.3.2....0.3.4....3.1.4....0.3.2....3.1.4....3.4.0
..2.4.2.0..4.1.4.1..4.1.5.2..5.2.0.3..5.2.5.1..1.4.5.0..5.2.3.2..5.1.4.3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 25 2012
STATUS
approved