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A230619 Number of 7Xn 0..2 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero 1
0, 0, 0, 509978, 128706852, 35145166536, 8937075346246, 2294186499807542, 587879941920096164, 150672100573449544628, 38618667880671318212660, 9898104313860041433700268, 2536935635060076589332989468 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Row 7 of A230614

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..27

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A263958 A273987 A250057 * A176655 A123321 A258362

Adjacent sequences:  A230616 A230617 A230618 * A230620 A230621 A230622

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 25 2013

STATUS

approved

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Last modified October 16 21:10 EDT 2019. Contains 328103 sequences. (Running on oeis4.)