A166806 Number of nX4 1..3 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 nondecreasing order.

3, 69, 443, 1871, 6301, 18295, 47655, 113995, 254280, 534707

Offset

1,1

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for n=4
...1.2.3.3...1.1.2.2...1.1.1.1...1.1.2.2...1.1.1.2...1.1.1.2...1.1.2.3
...2.2.2.3...1.2.2.2...1.1.3.3...1.1.2.2...1.1.1.2...1.1.3.2...1.2.2.3
...3.3.2.3...1.3.2.2...1.2.3.3...1.2.2.2...1.1.3.2...1.3.3.3...1.2.3.3
...3.3.3.3...3.3.2.2...1.2.3.3...1.2.2.3...1.2.2.2...3.3.3.3...2.2.3.3
------
...1.1.1.3...1.1.1.2...1.3.3.3...1.1.1.1...1.2.2.2...1.2.2.2...1.1.2.2
...1.1.3.3...1.1.3.2...2.2.3.3...1.1.2.3...1.2.2.2...2.2.2.3...1.1.2.3
...1.2.3.2...1.2.2.2...2.3.3.3...1.2.2.3...1.2.2.3...2.2.3.3...1.1.2.3
...2.2.2.2...1.2.2.2...3.3.3.3...1.2.3.3...1.2.2.3...3.3.3.3...2.2.2.2

Crossrefs

Sequence in context: A270869 A241222 A166835 * A219070 A086223 A089455

Adjacent sequences: A166803 A166804 A166805 * A166807 A166808 A166809

Keyword

nonn

Author

R. H. Hardin Oct 21 2009

Status

approved