A222605 Number of nX2 0..3 arrays with exactly floor(nX2/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..3 order

0, 6, 32, 520, 4556, 57072, 594544, 6958016, 77112256, 888878720, 10094914368, 116306178816, 1336001507840, 15439492158976, 178494573538304, 2069940863792128, 24032638451858432, 279564150926585856

Offset

1,2

Comments

Column 2 of A222608

Links

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

Example

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

Crossrefs

Sequence in context: A276351 A135538 A296314 * A290790 A222749 A132548

Adjacent sequences: A222602 A222603 A222604 * A222606 A222607 A222608

Keyword

nonn

Author

R. H. Hardin Feb 26 2013

Status

approved