OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..20
EXAMPLE
Some solutions for 4 X 4:
..3..3..3..1....1..1..1..3....3..3..1..1....1..1..1..1....1..2..1..2
..3..3..1..1....1..3..1..1....3..3..3..3....1..3..3..1....2..1..2..1
..3..1..3..1....1..1..3..3....1..3..1..1....1..3..3..3....1..2..1..2
..1..1..1..1....3..1..3..3....1..3..1..3....1..1..3..3....2..1..2..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 05 2011
STATUS
approved