A166788 Number of nX4 1..4 arrays containing at least one of each value, all equal values connected, and rows considered as a single number in nondecreasing order.

24, 1848, 26152, 204257, 1146094, 5161406

Offset

1,1

Links

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

Example

Some solutions for n=3
...1.1.3.2...3.2.2.1...3.2.1.4...2.2.2.2...3.2.2.2...3.3.3.1...1.3.3.2
...1.4.2.2...3.2.4.4...3.3.1.4...3.4.2.2...3.3.3.3...3.4.2.1...1.3.4.4
...1.4.4.2...3.3.4.4...3.4.4.4...4.4.1.2...4.4.4.1...3.4.4.4...3.3.3.4
------
...2.2.2.2...1.1.2.2...2.4.4.1...2.2.3.3...2.2.1.1...1.2.2.4...1.1.2.4
...3.1.1.2...1.1.4.2...3.4.4.1...2.3.3.3...2.4.1.1...1.2.2.4...1.1.4.4
...4.4.1.2...1.3.4.2...3.4.4.1...2.4.3.1...4.4.1.3...1.2.3.4...3.1.1.4

Crossrefs

Sequence in context: A348589 A227257 A222999 * A123794 A269648 A269338

Adjacent sequences: A166785 A166786 A166787 * A166789 A166790 A166791

Keyword

nonn

Author

R. H. Hardin Oct 21 2009

Status

approved