A166792 - OEIS

%I #3 Mar 31 2012 12:35:36

%S 60,1920,31595,360977,3126130

%N Number of nX6 1..3 arrays containing at least one of each value, all equal values connected, and rows considered as a single number in nondecreasing order.

%e Some solutions for n=3

%e ...1.1.1.1.3.3...3.2.2.2.2.1...1.1.1.1.1.3...2.2.1.1.1.1...1.1.1.2.2.3

%e ...2.1.1.1.1.3...3.3.3.2.1.1...1.3.1.1.1.3...2.2.1.3.2.1...2.2.1.2.2.3

%e ...2.1.1.3.3.3...3.3.3.2.1.1...2.3.3.3.3.3...2.2.2.2.2.2...2.2.2.2.3.3

%e ------

%e ...2.2.2.2.2.2...3.1.1.1.1.1...2.2.2.2.2.2...3.2.2.2.2.2...2.1.1.1.1.1

%e ...3.1.3.2.2.3...3.2.3.3.3.1...3.2.1.1.1.1...3.3.3.1.1.2...2.2.2.2.2.1

%e ...3.3.3.3.3.3...3.3.3.3.3.3...3.2.1.1.1.1...3.3.3.3.1.1...3.2.1.1.1.1

%K nonn

%O 1,1

%A _R. H. Hardin_ Oct 21 2009