A222674 Number of nX3 0..3 arrays with no more than floor(nX3/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order

1, 5, 11, 130, 670, 9587, 51055, 832433, 4403793, 76270010, 393405671, 7110030015, 35866532209, 668872050090, 3316350242047, 63280853470227, 309953030601699, 6011655335449938, 29208300615650596, 572992311551819596

Offset

1,2

Comments

Column 3 of A222679

Links

R. H. Hardin, Table of n, a(n) for n = 1..208

Example

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

Crossrefs

Sequence in context: A266421 A328445 A094108 * A197538 A083418 A266527

Adjacent sequences: A222671 A222672 A222673 * A222675 A222676 A222677

Keyword

nonn

Author

R. H. Hardin Feb 28 2013

Status

approved