A199228 Number of nX6 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and every element equal to zero or one horizontal or vertical neighbors

15, 1538, 108608, 9196334, 792389959, 70698654245, 6443389324257, 597038658964877, 56047378745263409

Offset

1,1

Comments

Column 6 of A199230

Links

Table of n, a(n) for n=1..9.

Example

Some solutions for n=4
..0..1..2..1..1..0....0..1..2..2..1..1....0..1..2..1..2..2....0..1..0..2..1..2
..0..1..2..0..2..1....0..2..1..0..2..2....0..1..2..0..1..0....0..1..2..1..2..1
..1..2..1..2..0..2....1..0..2..2..0..1....1..0..0..2..1..2....1..0..2..0..1..0
..0..2..0..1..0..2....0..1..0..0..1..2....0..2..2..1..0..1....0..2..0..2..1..2

Crossrefs

Sequence in context: A209680 A122469 A119784 * A344638 A209681 A209682

Adjacent sequences: A199225 A199226 A199227 * A199229 A199230 A199231

Keyword

nonn

Author

R. H. Hardin Nov 04 2011

Status

approved