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

Author

R. H. Hardin Feb 28 2013

Keywords

• nonn

Comments

Column 3 of A222679

Examples

			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
		

Links

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