A222651 Number of nX2 0..3 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..3 order

1, 7, 60, 724, 7364, 84816, 927152, 10585088, 119198624, 1364437632, 15584195392, 179262541056, 2063988209152, 23852186896896, 276080500860416, 3202923732204544, 37215026284325888, 433119059193262080

Offset

1,2

Comments

Column 2 of A222654

Links

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

Example

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

Crossrefs

Sequence in context: A241770 A243695 A210988 * A287689 A289874 A316124

Adjacent sequences: A222648 A222649 A222650 * A222652 A222653 A222654

Keyword

nonn

Author

R. H. Hardin Feb 27 2013

Status

approved