A223146 Number of nX4 0..2 arrays with no more than floor(nX4/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order

10, 187, 4065, 84196, 1753639, 36926759, 788312639, 17055726949, 373400072400, 8256792930855, 184090480905482, 4132305583955186, 93275576521838179, 2115119659086818460, 48145683687395482000, 1099433387636066838881

Offset

1,1

Comments

Column 4 of A223149

Links

R. H. Hardin, Table of n, a(n) for n = 1..54

Example

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

Crossrefs

Sequence in context: A179521 A211102 A121973 * A365175 A239765 A006409

Adjacent sequences: A223143 A223144 A223145 * A223147 A223148 A223149

Keyword

nonn

Author

R. H. Hardin Mar 16 2013

Status

approved