A222605 - OEIS

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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

(list; graph; refs; listen; history; text; internal format)

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