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A230681 Number of 7Xn 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value 2-x(i,j) 0
0, 63291, 53519163, 42681522741, 47444197636239, 51564141085334199, 55314799986833459367, 59453762981075686349985, 63928300225239002685024369 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 7 of A230675

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=3

..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0

..0..2..2....0..2..2....0..2..2....0..2..2....0..2..2....0..2..2....0..2..2

..0..1..0....0..1..1....0..0..0....0..1..0....0..0..0....0..0..0....0..0..1

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

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

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

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

CROSSREFS

Sequence in context: A234080 A232264 A209713 * A209793 A115748 A226003

Adjacent sequences:  A230678 A230679 A230680 * A230682 A230683 A230684

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 27 2013

STATUS

approved

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Last modified July 4 04:35 EDT 2022. Contains 355063 sequences. (Running on oeis4.)