A166847 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 decreasing order.

1, 84, 1595, 14610, 89718, 425640

Offset

1,2

Links

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

Example

Some solutions for n=3
...2.1.1.1...3.3.2.1...2.2.1.1...4.3.3.1...1.1.1.1...3.3.1.1...4.3.1.1
...4.1.1.1...4.1.1.1...3.2.4.1...4.3.3.1...3.3.1.1...4.1.1.1...4.3.4.2
...4.4.3.1...4.4.4.4...3.3.4.1...4.4.2.1...4.3.3.2...4.4.4.2...4.4.4.2
------
...2.2.2.2...3.3.3.1...3.2.1.1...3.1.1.1...2.2.2.2...4.3.2.1...3.3.3.3
...3.2.2.1...4.2.2.2...3.2.2.1...3.3.2.1...3.3.2.1...4.4.4.1...4.3.2.2
...4.2.1.1...4.4.2.2...3.4.4.1...3.4.2.2...4.2.2.2...4.4.4.1...4.3.3.1

Crossrefs

Sequence in context: A219476 A008359 A359934 * A219938 A271670 A358864

Adjacent sequences: A166844 A166845 A166846 * A166848 A166849 A166850

Keyword

nonn

Author

R. H. Hardin Oct 21 2009

Status

approved