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A166768
Number of n X 4 1..4 arrays containing at least one of each value, and all equal values connected.
0
24, 3672, 103800, 1505784, 15094248, 120002640
OFFSET
1,1
EXAMPLE
Some solutions for n=3
...1.1.1.1...2.4.4.1...2.2.2.3...4.1.2.2...1.1.2.4...1.4.4.3...4.1.1.1
...3.2.3.4...2.4.4.3...1.1.1.1...4.3.3.2...3.3.2.4...1.1.4.4...4.1.2.3
...3.3.3.3...3.3.3.3...4.1.1.1...2.2.2.2...3.3.3.4...2.2.2.2...2.2.2.2
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...3.3.3.1...2.2.1.4...2.2.4.4...3.3.3.2...3.4.1.4...2.1.3.2...4.3.3.3
...3.2.3.1...2.1.1.3...3.3.3.3...1.4.3.3...4.4.4.4...2.1.4.2...2.1.3.3
...2.2.2.4...2.3.3.3...3.1.1.1...1.3.3.3...4.4.2.2...2.2.2.2...1.1.1.1
CROSSREFS
Sequence in context: A223123 A278651 A357266 * A326120 A159399 A184687
KEYWORD
nonn,more
AUTHOR
R. H. Hardin Oct 21 2009
STATUS
approved