A166764 Number of nX3 1..5 arrays containing at least one of each value, and all equal values connected.

0, 840, 47400, 854520, 8876160, 65256840, 378654840, 1851326280

Offset

1,2

Links

Table of n, a(n) for n=1..8.

Example

Some solutions for n=3
...2.5.3...2.2.5...2.3.4...2.2.4...1.4.5...2.5.3...3.2.5...4.4.1...4.5.4
...5.5.1...2.4.3...2.2.2...2.1.4...1.4.3...4.4.3...4.2.2...5.4.2...4.4.4
...5.4.1...1.4.3...5.2.1...3.3.5...2.4.4...4.4.1...4.4.1...3.2.2...2.3.1
------
...4.4.4...2.5.4...3.3.4...1.3.3...2.4.4...2.2.2...5.4.4...4.2.5...2.1.4
...3.2.1...2.2.4...3.5.4...3.3.5...3.4.1...3.5.5...5.4.4...4.3.1...5.5.4
...5.2.2...3.2.1...2.5.1...2.3.4...5.5.1...1.4.4...1.3.2...1.1.1...5.3.3

Crossrefs

Sequence in context: A171260 A166758 A188781 * A226268 A218410 A022052

Adjacent sequences: A166761 A166762 A166763 * A166765 A166766 A166767

Keyword

nonn

Author

R. H. Hardin Oct 21 2009

Status

approved