A199229 Number of nX7 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

90, 19458, 1114424, 530601540, 96560931821, 6443389324257

Offset

1,1

Comments

Column 7 of A199230

Links

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

Example

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

Crossrefs

Sequence in context: A359842 A295594 A200503 * A278411 A278631 A323317

Adjacent sequences: A199226 A199227 A199228 * A199230 A199231 A199232

Keyword

nonn

Author

R. H. Hardin Nov 04 2011

Status

approved