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A231042 Number of 6Xn 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 at least one element with value (x(i,j)-1) mod 3, and upper left element zero 0
0, 12, 2988, 375620, 36327118, 10140483166, 1844073908022, 383056487876288, 74556370297711856, 14997676327239628696 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 6 of A231037

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

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

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

CROSSREFS

Sequence in context: A028666 A103658 A271515 * A283831 A268008 A222922

Adjacent sequences:  A231039 A231040 A231041 * A231043 A231044 A231045

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 03 2013

STATUS

approved

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Last modified August 20 22:45 EDT 2019. Contains 326155 sequences. (Running on oeis4.)