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A231062 Number of nX7 0..3 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero 1
0, 778, 47998, 3607664, 270096962, 20286249268, 1524513500124, 114623595936566, 8620079317973610, 648336326622533098, 48765953333817735404, 3668154457146990333796, 275921956841908575609620 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 7 of A231063

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..26

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A237162 A252529 A008746 * A200559 A231252 A341190

Adjacent sequences: A231059 A231060 A231061 * A231063 A231064 A231065

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 03 2013

STATUS

approved

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Last modified February 8 12:02 EST 2023. Contains 360138 sequences. (Running on oeis4.)