OFFSET
1,1
COMMENTS
Column 7 of A185559
EXAMPLE
Some solutions for 4X7 with a(1,1)=0
..0..0..0..1..1..2..2....0..0..0..1..1..2..2....0..0..1..1..2..2..1
..0..1..0..1..0..0..0....0..1..0..2..2..0..2....0..1..0..1..2..2..1
..0..1..0..1..0..2..2....0..1..0..2..1..0..2....0..1..0..1..0..0..2
..0..0..0..2..2..1..1....0..0..0..1..1..2..2....0..0..0..1..1..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 31 2011
STATUS
approved