A166765 Number of nX3 1..6 arrays containing at least one of each value, and all equal values connected.

0, 720, 149760, 5145840, 85542480, 921983760

Offset

1,2

Links

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

Example

Some solutions for n=3
...4.4.6...2.6.3...3.6.4...5.6.4...1.2.2...6.5.1...5.2.2...6.1.4...4.2.3
...1.1.6...5.6.3...1.5.4...5.6.3...3.5.4...3.3.4...6.4.3...5.1.4...5.1.3
...2.5.3...4.6.1...1.5.2...2.1.3...6.5.4...2.3.3...4.4.1...2.2.3...6.1.1
------
...1.4.3...5.1.4...4.1.1...5.5.5...4.6.2...3.3.3...6.2.3...5.5.3...2.2.2
...1.4.2...5.1.2...5.2.6...6.4.1...5.5.2...6.2.4...6.6.1...2.3.3...3.4.1
...6.5.2...3.6.2...5.5.3...2.3.3...3.1.2...1.5.4...6.4.5...1.6.4...5.5.6

Crossrefs

Sequence in context: A294705 A222004 A047803 * A008411 A221436 A239184

Adjacent sequences: A166762 A166763 A166764 * A166766 A166767 A166768

Keyword

nonn

Author

R. H. Hardin Oct 21 2009

Status

approved