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A204077 Number of n X n 0..3 arrays with every element neighboring horizontally or vertically both a 0 and a 1 0
0, 4, 132, 11236, 13346532, 94591923364, 4337212764978412, 1473512792354952891844 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A204084

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Sequence in context: A204079 A252172 A192837 * A194537 A194538 A194539

Adjacent sequences:  A204074 A204075 A204076 * A204078 A204079 A204080

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 10 2012

STATUS

approved

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Last modified November 20 15:12 EST 2018. Contains 317402 sequences. (Running on oeis4.)