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A231053 Number of 5Xn 0..3 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4 and at least one element with value (x(i,j)-1) mod 4, no adjacent elements equal, and upper left element zero 1
0, 22, 2430, 18688, 344136, 10631552, 274004640, 6591073664, 162458658900, 4045673867452, 100391649169040, 2487331534394008, 61659987625594416, 1528888686849171692, 37906407338692090040, 939795970497387880692 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 5 of A231049

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A117990 A098130 A078278 * A078275 A200805 A128854

Adjacent sequences:  A231050 A231051 A231052 * A231054 A231055 A231056

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 03 2013

STATUS

approved

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Last modified September 24 07:01 EDT 2020. Contains 337317 sequences. (Running on oeis4.)