A222826 Number of nX3 0..3 arrays with no more than floor(nX3/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order

2, 80, 2695, 163059, 4990235, 324288311, 10170499564, 674288738013, 21373928441126, 1435823246721009, 45884479727848365, 3108101397467123619, 99916343889082020272, 6807459787910922090689, 219837420324993531866814

Offset

1,1

Comments

Column 3 of A222828

Links

R. H. Hardin, Table of n, a(n) for n = 1..68

Example

Some solutions for n=3
..0..1..2....0..1..1....0..1..2....0..1..2....0..1..2....0..1..2....0..1..2
..1..3..1....2..2..0....2..3..0....1..3..0....2..1..3....0..3..1....3..3..1
..2..1..3....0..3..2....0..3..0....2..0..1....3..0..1....2..3..0....0..2..0

Crossrefs

Sequence in context: A371151 A195000 A073499 * A123828 A260659 A351854

Adjacent sequences: A222823 A222824 A222825 * A222827 A222828 A222829

Keyword

nonn

Author

R. H. Hardin Mar 06 2013

Status

approved