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A209086 Number of n X n 0..3 arrays avoiding the pattern z z+1 z horizontally and z z-1 z vertically 0
4, 256, 196916, 1971161340, 260988770962672, 455585601029801268422 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A209092

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A206961 A206569 A207576 * A207051 A207128 A223579

Adjacent sequences:  A209083 A209084 A209085 * A209087 A209088 A209089

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 05 2012

STATUS

approved

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Last modified August 11 15:10 EDT 2022. Contains 356066 sequences. (Running on oeis4.)