OFFSET
1,2
EXAMPLE
All solutions for n=3
...1.1.1...1.1.1...1.1.1...1.1.1...1.1.1...1.1.1...1.1.2...1.1.1...1.1.1
...1.1.2...1.1.2...1.2.1...1.2.1...1.2.1...1.2.2...1.2.2...2.1.1...2.1.1
...1.2.2...2.2.2...1.2.2...2.2.1...2.2.2...2.2.2...2.2.2...2.2.1...2.2.2
------
...1.1.1...1.1.1...1.1.2...2.1.1...2.1.1
...2.1.2...2.2.1...2.1.2...2.1.2...2.2.1
...2.2.2...2.2.2...2.2.2...2.2.2...2.2.2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 21 2009
STATUS
approved