A222426 Number of nX3 0..2 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order

0, 4, 4, 75, 298, 3256, 12442, 142378, 538894, 6301728, 23842008, 282114008, 1069422214, 12748422020, 48447493914, 580528933846, 2211742435662, 26603475803716, 101589612854304, 1225538029932274, 4689384205041280

Offset

1,2

Comments

Column 3 of A222430

Links

R. H. Hardin, Table of n, a(n) for n = 1..190

Example

Some solutions for n=4
..0..0..0....0..1..0....0..0..0....0..1..1....0..0..1....0..1..1....0..0..1
..0..1..1....1..0..0....0..0..0....1..1..1....2..2..2....2..2..2....0..0..0
..1..1..1....0..0..0....0..1..0....0..1..1....2..2..2....2..2..2....0..0..0
..1..1..1....0..0..0....1..1..1....1..1..1....2..2..2....2..2..2....1..0..0

Crossrefs

Sequence in context: A119600 A244027 A219796 * A107053 A327303 A337302

Adjacent sequences: A222423 A222424 A222425 * A222427 A222428 A222429

Keyword

nonn

Author

R. H. Hardin Feb 19 2013

Status

approved