A166821 Number of nX3 1..5 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 increasing order.

0, 105, 2720, 24929, 141248, 600051, 2097517, 6359213

Offset

1,2

Links

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

Example

Some solutions for n=3
...1.2.3...1.4.4...1.3.4...1.3.4...2.4.4...1.1.3...2.3.3...1.1.2...1.3.4
...2.2.3...2.2.4...1.5.4...2.2.5...2.4.5...2.4.3...4.1.5...1.3.5...1.5.2
...4.5.3...5.3.4...2.5.4...2.2.5...3.3.1...5.5.3...4.4.4...4.5.5...1.5.5
------
...1.2.2...2.4.4...1.1.3...2.4.5...1.1.4...2.3.5...1.1.5...2.2.3...1.2.4
...4.3.3...5.1.3...1.1.3...2.5.5...2.2.5...4.3.1...1.2.2...2.4.4...1.5.4
...4.4.5...5.1.3...2.5.4...3.1.1...3.5.5...4.3.1...4.3.2...5.4.1...3.5.4

Crossrefs

Sequence in context: A027788 A112497 A220822 * A166803 A262075 A018233

Adjacent sequences: A166818 A166819 A166820 * A166822 A166823 A166824

Keyword

nonn

Author

R. H. Hardin Oct 21 2009

Status

approved