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A166768 Number of nX4 1..4 arrays containing at least one of each value, and all equal values connected. 0
24, 3672, 103800, 1505784, 15094248, 120002640 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..6.

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

------

...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: A275637 A223123 A278651 * A159399 A184687 A007241

Adjacent sequences:  A166765 A166766 A166767 * A166769 A166770 A166771

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 21 2009

STATUS

approved

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Last modified August 20 04:25 EDT 2019. Contains 326139 sequences. (Running on oeis4.)