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A231083 Number of 4Xn 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 1
0, 16, 784, 6400, 523936, 18937480, 696453136, 30127054808, 1203039376496, 49023513712288, 2010671884313880, 81998717799206912, 3352895475848102456, 137081873989488633040, 5603285932124202010832, 229087654176368560609832 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 4 of A231080

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A215171 A224736 A232519 * A173984 A186855 A159872

Adjacent sequences:  A231080 A231081 A231082 * A231084 A231085 A231086

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 03 2013

STATUS

approved

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Last modified February 17 21:35 EST 2020. Contains 332006 sequences. (Running on oeis4.)