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Search: id:A166836
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A166836 Number of nX4 1..4 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in nonincreasing order. +0
1
1, 219, 3170, 23464, 124843, 538072, 1990990 (list; graph; listen)
OFFSET

1,2

EXAMPLE

Some solutions for n=3

...3.2.2.2...3.2.2.2...4.3.1.1...2.2.1.1...2.2.1.1...3.1.1.1...2.1.1.1

...3.3.3.1...3.4.2.1...4.3.4.2...4.2.2.1...2.2.4.4...3.2.1.1...2.2.2.2

...4.4.3.3...3.4.2.2...4.4.4.4...4.2.3.1...3.2.4.4...3.4.1.1...4.3.2.2

------

...3.3.2.1...3.3.2.2...2.2.1.1...2.1.1.1...2.2.1.1...2.2.2.2...4.3.3.3

...3.3.2.2...4.3.3.1...4.3.3.1...4.3.1.1...2.2.4.3...4.3.2.1...4.4.1.1

...3.3.4.2...4.4.1.1...4.4.4.1...4.3.3.3...2.2.4.4...4.3.2.1...4.4.2.2

CROSSREFS

Sequence in context: A025406 A025404 A043435 this_sequence A157645 A157673 A064477

Adjacent sequences: A166833 A166834 A166835 this_sequence A166837 A166838 A166839

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Oct 21 2009

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.


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