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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

(list; graph; refs; listen; history; text; internal format)

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