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A222607 Number of nX4 0..3 arrays with exactly floor(nX4/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..3 order 1
6, 520, 42492, 3584673, 298478633, 24650010932, 2035465167670, 168350085915504, 13958743683093883, 1160492141797944493, 96733147665986387049, 8083044767407067197260, 676949508302758384319910 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A222608

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..18

EXAMPLE

Some solutions for n=3

..0..1..2..3....0..1..0..2....0..1..2..0....0..1..1..2....0..1..0..1

..3..2..3..1....2..2..1..1....2..3..2..1....2..2..3..1....2..3..0..3

..0..1..0..1....3..2..3..2....0..2..0..1....2..1..0..2....3..0..0..2

CROSSREFS

Sequence in context: A290937 A250391 A003395 * A000411 A180431 A202967

Adjacent sequences:  A222604 A222605 A222606 * A222608 A222609 A222610

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 26 2013

STATUS

approved

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Last modified May 28 21:37 EDT 2020. Contains 334690 sequences. (Running on oeis4.)