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A230468 Number of nX7 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero 1
0, 6912, 8724560, 5660619846, 3934875952932, 2758566554003680, 1929668277796729476, 1350140379793882468662, 944662799753269088092792, 660957923175167342980769708, 462456588637397425299120042326 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 7 of A230469

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..43

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A268908 A192077 A272913 * A186059 A253612 A004243

Adjacent sequences:  A230465 A230466 A230467 * A230469 A230470 A230471

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 20 2013

STATUS

approved

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Last modified January 28 04:30 EST 2022. Contains 350654 sequences. (Running on oeis4.)