OFFSET
1,1
COMMENTS
Column 4 of A186553
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..20
EXAMPLE
Some solutions for 4X6
..0..0..1..0..0..2....0..0..0..2..0..1....0..2..2..0..0..1....0..2..2..0..0..2
..0..0..0..2..0..1....0..0..0..0..0..3....0..0..0..0..1..3....0..0..0..2..0..3
..0..0..0..0..0..3....0..0..0..2..2..1....0..0..0..0..0..1....0..0..0..2..0..3
..0..0..0..0..3..1....0..0..0..0..0..1....0..0..0..0..0..2....0..0..0..0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 23 2011
STATUS
approved