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A166807
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 nondecreasing order.
0
1, 269, 3909, 29742, 160612, 694843, 2563636
OFFSET
1,2
EXAMPLE
Some solutions for n=3
...1.1.1.3...1.3.3.3...1.1.1.2...1.3.3.4...1.2.3.4...1.1.2.2...1.1.3.4
...2.4.4.3...1.3.3.4...1.2.2.2...2.3.4.4...1.2.3.4...1.2.2.3...1.3.3.4
...4.4.4.4...2.3.3.4...4.2.3.2...2.3.4.4...1.3.3.4...2.2.2.4...2.2.3.4
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...1.1.4.4...1.1.2.2...1.2.2.2...1.1.1.4...1.4.4.4...1.1.1.3...2.2.2.3
...1.2.2.2...1.4.2.3...2.2.4.4...1.3.4.4...2.2.3.4...1.1.2.3...2.4.4.4
...1.3.3.3...2.2.2.3...2.3.3.3...3.3.2.2...2.2.4.4...2.2.2.4...4.4.4.1
CROSSREFS
Sequence in context: A059330 A054803 A251216 * A131264 A053322 A274328
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 21 2009
STATUS
approved