A199233 Number of nX4 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 at least one horizontal or vertical neighbor

0, 12, 134, 7772, 233185, 2350573, 198168342, 5945464970, 61459551305, 5513397881816, 170180145113452, 1793698349077584, 165352227478417900, 5196360663854340690, 55445845644254306328, 5198278149707750425296

Offset

1,2

Comments

Column 4 of A199237

Links

R. H. Hardin, Table of n, a(n) for n = 1..19

Example

Some solutions for n=5
..0..0..0..1....0..0..0..1....0..0..0..1....0..0..1..0....0..0..1..1
..1..2..2..1....0..0..1..1....0..2..2..1....1..1..1..0....0..2..2..1
..1..1..0..2....2..2..1..2....1..2..0..0....2..2..1..2....2..2..1..1
..1..0..0..2....0..0..1..2....1..1..0..2....0..2..1..2....2..2..0..0
..1..2..2..2....2..2..1..2....1..1..2..2....0..0..2..2....1..1..0..0

Crossrefs

Sequence in context: A214994 A208440 A218762 * A085938 A161124 A288035

Adjacent sequences: A199230 A199231 A199232 * A199234 A199235 A199236

Keyword

nonn

Author

R. H. Hardin Nov 04 2011

Status

approved