A223468 Number of nX2 0..2 arrays with no more than floor(nX2/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..2 order

1, 6, 18, 58, 140, 352, 776, 1752, 3696, 7904, 16288, 33824, 68800, 140544, 283776, 574336, 1154816, 2324992, 4663808, 9361920, 18754560, 37584896, 75237376, 150640640, 301428736, 603217920, 1206755328, 2414288896, 4829265920

Offset

1,2

Comments

Column 2 of A223473

Links

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

Example

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

Crossrefs

Sequence in context: A363517 A227809 A119106 * A223211 A334330 A144706

Adjacent sequences: A223465 A223466 A223467 * A223469 A223470 A223471

Keyword

nonn

Author

R. H. Hardin Mar 20 2013

Status

approved