OFFSET
2,2
EXAMPLE
All solutions for n=3
.....1........1........1........1........1........1........1........1...
....2.1......1.1......2.3......1.3......2.1......1.1......2.3......1.3..
...2.2.3....2.2.3....2.2.3....2.2.3....2.3.3....2.3.3....2.3.3....2.3.3.
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.....1........1........1........1........1........1........1........1...
....2.2......2.2......1.1......1.3......2.1......3.3......3.3......1.2..
...2.2.3....2.3.3....2.1.3....2.1.3....2.1.3....2.2.3....2.3.3....2.2.3.
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.....1...
....3.1..
...2.3.3.
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Aug 24 2009
STATUS
approved