A222374 Number of nX3 0..3 arrays with no more than floor(nX3/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order

1, 5, 9, 118, 498, 8111, 37107, 676485, 3140167, 58995438, 275054103, 5223616489, 24395423052, 466212749842, 2180168118272, 41855166855421, 195981171753608, 3775984650279490, 17703134058396750, 342076192235557748

Offset

1,2

Comments

Column 3 of A222378

Links

R. H. Hardin, Table of n, a(n) for n = 1..130

Example

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

Crossrefs

Sequence in context: A280642 A359396 A222583 * A097397 A092584 A145400

Adjacent sequences: A222371 A222372 A222373 * A222375 A222376 A222377

Keyword

nonn

Author

R. H. Hardin Feb 17 2013

Status

approved