OFFSET
1,1
COMMENTS
Column 4 of A187140
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
EXAMPLE
Some solutions for 4X5
..0..2..0..0..1....1..2..2..2..0....0..0..1..1..2....1..0..1..0..2
..0..0..0..2..2....1..1..0..0..0....0..1..1..1..0....0..0..1..1..2
..0..0..1..1..0....0..0..0..1..1....0..0..1..1..0....0..0..1..1..2
..0..0..0..1..1....0..0..0..2..1....0..0..1..0..0....0..0..0..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 05 2011
STATUS
approved