A222917 Number of nX6 0..2 arrays with exactly floor(nX6/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order

16, 3972, 356398, 27663713, 2133576918, 165904381397, 13105585711754, 1050919351971302, 85401044148714188

Offset

1,1

Comments

Column 6 of A222918

Links

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

Example

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

Crossrefs

Sequence in context: A217021 A087519 A367535 * A060616 A297387 A016936

Adjacent sequences: A222914 A222915 A222916 * A222918 A222919 A222920

Keyword

nonn

Author

R. H. Hardin Mar 09 2013

Status

approved