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A166767 Number of nX4 1..3 arrays containing at least one of each value, and all equal values connected. 0
18, 642, 8100, 64980, 410832, 2247456, 11162262, 51747942, 227868462 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=3

...3.3.3.3...3.1.2.2...2.1.3.3...2.2.2.2...3.2.2.2...3.3.3.2...2.2.2.2

...3.3.3.3...3.3.2.2...2.3.3.3...1.2.2.3...3.2.1.2...3.1.3.3...2.2.3.1

...1.2.2.3...3.3.3.2...3.3.3.3...1.1.1.1...2.2.1.1...1.1.3.3...2.2.3.1

------

...3.3.2.2...1.1.2.2...3.2.2.1...1.1.3.3...2.3.3.3...1.1.3.3...1.1.2.2

...3.3.1.2...1.2.2.2...3.1.1.1...1.3.3.3...2.3.3.1...1.3.3.3...1.2.2.2

...3.3.3.3...2.2.3.2...3.1.1.1...1.1.2.3...2.2.3.3...3.3.2.2...1.1.2.3

CROSSREFS

Sequence in context: A180822 A295369 A281559 * A322889 A003298 A049869

Adjacent sequences:  A166764 A166765 A166766 * A166768 A166769 A166770

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 21 2009

STATUS

approved

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Last modified September 22 16:59 EDT 2019. Contains 327311 sequences. (Running on oeis4.)