A222981 Number of nX3 0..2 arrays with no more than floor(nX3/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order.

1, 7, 43, 584, 2903, 45718, 227569, 3706702, 18721501, 309335666, 1578160193, 26302908158, 135163043693, 2266015930226, 11706886012409, 197109806616950, 1022513778146405, 17272771472939290, 89894465367630385

Offset

1,2

Comments

Column 3 of A222986

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A204733 A195230 A316635 * A023316 A289737 A065786

Adjacent sequences: A222978 A222979 A222980 * A222982 A222983 A222984

Keyword

nonn

Author

R. H. Hardin, Mar 11 2013

Status

approved