OFFSET
1,1
COMMENTS
Column 6 of A201235
EXAMPLE
Some solutions for n=4
..0..0..0..1..1..1....0..0..1..1..2..2....0..0..1..1..1..1....0..0..0..0..0..1
..0..0..2..1..3..3....0..0..1..1..3..2....0..0..3..1..3..2....0..1..1..3..3..2
..0..3..2..2..2..2....0..1..1..3..3..2....0..0..2..1..3..2....1..1..2..3..2..3
..1..1..3..3..2..3....0..2..3..2..3..3....2..2..2..3..3..3....1..2..2..2..3..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 28 2011
STATUS
approved