A223148 Number of nX6 0..2 arrays with no more than floor(nX6/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order

72, 5721, 487176, 36926759, 2829178640, 219590496125, 17348791308859, 1392509665602089, 113307992984969726

Offset

1,1

Comments

Column 6 of A223149

Links

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

Example

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

Crossrefs

Sequence in context: A358117 A358116 A216705 * A289368 A334357 A119750

Adjacent sequences: A223145 A223146 A223147 * A223149 A223150 A223151

Keyword

nonn

Author

R. H. Hardin Mar 16 2013

Status

approved