login
A166787
Number of nX4 1..3 arrays containing at least one of each value, all equal values connected, and rows considered as a single number in nondecreasing order.
0
18, 330, 2340, 11261, 42611, 136460, 385764, 988439
OFFSET
1,1
EXAMPLE
Some solutions for n=3
...2.2.2.2...2.2.1.1...1.1.2.2...2.1.3.3...2.2.2.2...2.1.1.1...2.2.2.2
...2.2.2.2...2.3.1.1...1.1.2.2...2.3.3.3...3.3.2.1...2.1.2.1...2.3.1.1
...3.3.2.1...2.3.3.1...3.1.1.1...3.3.3.3...3.3.2.1...2.2.2.3...3.3.3.3
------
...1.1.1.1...2.1.3.3...1.1.1.1...1.1.1.3...1.1.1.1...2.2.2.2...2.2.1.2
...1.2.1.3...3.3.3.3...1.1.1.3...2.1.1.3...3.2.1.1...3.2.1.1...2.2.2.2
...1.2.3.3...3.3.3.3...1.2.2.2...2.3.3.3...3.3.3.1...3.2.2.1...2.3.2.2
CROSSREFS
Sequence in context: A041145 A041614 A222812 * A280806 A068771 A039646
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 21 2009
STATUS
approved