1,2

Some solutions for n=4

...2.2.1.1...2.1.1.1...1.1.1.1...2.1.1.1...3.2.2.1...3.2.2.2...2.2.2.2

...2.2.2.2...2.2.1.1...2.1.1.1...2.2.1.1...3.2.2.1...3.3.2.1...3.2.2.1

...3.2.3.2...2.2.2.1...2.2.2.1...2.2.2.1...3.2.2.1...3.3.2.2...3.3.2.1

...3.3.3.3...3.3.3.3...2.3.2.1...2.2.3.3...3.3.2.2...3.3.2.2...3.3.3.1

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...2.1.1.1...2.2.2.1...2.2.2.2...1.1.1.1...3.2.1.1...2.2.2.2...2.1.1.1

...2.2.2.1...2.2.2.1...3.2.2.1...1.1.1.1...3.2.2.1...3.2.1.1...2.2.2.1

...2.2.2.1...3.2.2.1...3.2.2.1...3.2.1.1...3.2.2.1...3.2.3.1...2.3.2.1

...2.3.2.1...3.3.2.2...3.3.1.1...3.2.2.1...3.3.3.1...3.3.3.1...3.3.2.1

Sequence in context: A051606 A001691 A157906 this_sequence A058421 A128876 A105974

Adjacent sequences: A166843 A166844 A166845 this_sequence A166847 A166848 A166849

nonn

Ron Hardin (rhhardin(AT)att.net) Oct 21 2009