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A220784 Agreement numbers: number of nX3 arrays of the count of horizontal and vertical neighbors equal to the corresponding element in a random 0..3 nX3 array 0
4, 66, 1197, 21551, 388159, 6991108, 125915577, 2267843221, 40845722318, 735665065835 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A220786

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=3

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

..2..4..3....0..3..3....3..3..1....1..1..0....1..3..0....1..1..1....0..2..2

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

CROSSREFS

Sequence in context: A015475 A197947 A220798 * A025585 A302657 A198893

Adjacent sequences:  A220781 A220782 A220783 * A220785 A220786 A220787

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 20 2012

STATUS

approved

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Last modified May 28 12:26 EDT 2020. Contains 334681 sequences. (Running on oeis4.)