A223028 Number of nX2 0..2 arrays with exactly floor(nX2/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..2 order

0, 6, 16, 58, 136, 352, 768, 1752, 3680, 7904, 16256, 33824, 68736, 140544, 283648, 574336, 1154560, 2324992, 4663296, 9361920, 18753536, 37584896, 75235328, 150640640, 301424640, 603217920, 1206747136, 2414288896, 4829249536

Offset

1,2

Comments

Column 2 of A223033

Links

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

Example

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

Crossrefs

Sequence in context: A032282 A084057 A163302 * A091649 A125628 A078672

Adjacent sequences: A223025 A223026 A223027 * A223029 A223030 A223031

Keyword

nonn

Author

R. H. Hardin Mar 12 2013

Status

approved