A166795 Number of n X n 1..2 arrays containing at least one of each value, all equal values connected, and rows considered as a single number in increasing order.

0, 5, 14, 68, 652, 16016

Offset

1,2

Links

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

Example

All solutions for n=3
...1.1.1...1.1.1...1.1.1...1.1.1...1.1.1...1.1.1...1.1.2...1.1.1...1.1.1
...1.1.2...1.1.2...1.2.1...1.2.1...1.2.1...1.2.2...1.2.2...2.1.1...2.1.1
...1.2.2...2.2.2...1.2.2...2.2.1...2.2.2...2.2.2...2.2.2...2.2.1...2.2.2
------
...1.1.1...1.1.1...1.1.2...2.1.1...2.1.1
...2.1.2...2.2.1...2.1.2...2.1.2...2.2.1
...2.2.2...2.2.2...2.2.2...2.2.2...2.2.2

Crossrefs

Sequence in context: A346212 A324011 A194994 * A128102 A304060 A197901

Adjacent sequences: A166792 A166793 A166794 * A166796 A166797 A166798

Keyword

nonn

Author

R. H. Hardin, Oct 21 2009

Status

approved