A166792 Number of nX6 1..3 arrays containing at least one of each value, all equal values connected, and rows considered as a single number in nondecreasing order.

60, 1920, 31595, 360977, 3126130

Offset

1,1

Links

Table of n, a(n) for n=1..5.

Example

Some solutions for n=3
...1.1.1.1.3.3...3.2.2.2.2.1...1.1.1.1.1.3...2.2.1.1.1.1...1.1.1.2.2.3
...2.1.1.1.1.3...3.3.3.2.1.1...1.3.1.1.1.3...2.2.1.3.2.1...2.2.1.2.2.3
...2.1.1.3.3.3...3.3.3.2.1.1...2.3.3.3.3.3...2.2.2.2.2.2...2.2.2.2.3.3
------
...2.2.2.2.2.2...3.1.1.1.1.1...2.2.2.2.2.2...3.2.2.2.2.2...2.1.1.1.1.1
...3.1.3.2.2.3...3.2.3.3.3.1...3.2.1.1.1.1...3.3.3.1.1.2...2.2.2.2.2.1
...3.3.3.3.3.3...3.3.3.3.3.3...3.2.1.1.1.1...3.3.3.3.1.1...3.2.1.1.1.1

Crossrefs

Sequence in context: A017723 A214946 A058836 * A013925 A083367 A173123

Adjacent sequences: A166789 A166790 A166791 * A166793 A166794 A166795

Keyword

nonn

Author

R. H. Hardin Oct 21 2009

Status

approved