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A166763 Number of nX3 1..4 arrays containing at least one of each value, and all equal values connected. 0
0, 504, 10560, 103800, 671448, 3348840, 14014320, 51729072, 173858832, 543596760, 1605266976, 4526990088, 12293408616 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

EXAMPLE

Some solutions for n=3

...1.1.1...3.1.1...2.2.3...3.4.1...1.4.2...1.1.1...1.1.2...2.2.3...1.2.4

...2.4.1...1.1.4...1.2.3...3.4.1...1.2.2...1.1.2...4.1.1...1.4.3...1.1.1

...3.4.4...2.4.4...4.2.3...3.2.1...3.3.2...4.3.2...1.1.3...1.3.3...1.3.1

------

...3.3.3...1.2.2...2.1.1...3.3.1...4.4.4...4.4.4...3.3.2...2.3.3...3.3.3

...4.4.1...1.2.4...4.1.1...1.1.1...2.2.1...3.2.4...3.4.2...2.2.1...4.4.1

...2.1.1...3.3.4...3.3.3...4.2.2...2.3.1...3.2.1...3.4.1...4.2.2...4.2.1

CROSSREFS

Sequence in context: A180164 A061124 A141145 * A012829 A013973 A012744

Adjacent sequences:  A166760 A166761 A166762 * A166764 A166765 A166766

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Oct 21 2009

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Last modified February 14 18:02 EST 2012. Contains 205660 sequences.