login
Number of nX4 1..4 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in increasing order.
0

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

%S 1,92,1950,18821,117600,558447

%N Number of nX4 1..4 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in increasing order.

%e Some solutions for n=3

%e ...1.1.1.4...1.1.1.2...1.1.4.4...1.1.1.4...1.1.3.4...1.1.2.4...1.1.3.3

%e ...1.1.4.4...1.1.4.4...1.2.2.4...1.3.4.4...1.2.3.4...1.1.4.4...1.3.3.4

%e ...1.2.4.3...3.4.4.4...3.2.4.4...3.3.2.4...1.4.4.4...3.4.4.4...2.3.3.4

%e ------

%e ...1.1.1.4...1.1.4.4...1.1.3.3...1.1.2.3...1.2.2.4...1.2.2.2...1.1.2.2

%e ...1.2.4.4...1.2.2.2...1.4.4.4...1.3.3.3...2.2.2.4...2.2.3.4...1.2.2.4

%e ...3.2.2.4...1.2.2.3...4.4.2.4...1.3.4.3...3.3.4.4...2.3.3.3...1.3.3.3

%K nonn

%O 1,2

%A _R. H. Hardin_ Oct 21 2009