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A204080 Number of nX4 0..3 arrays with every element neighboring horizontally or vertically both a 0 and a 1 1
0, 16, 256, 11236, 107584, 3904576, 76212900, 1650959424, 39031534096, 864587548224, 19412272036096, 437675604807204, 9849402103175716, 221594251463336196, 4988444738917091904, 112294697209531469824 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 4 of A204084

LINKS

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

EXAMPLE

Some solutions for n=5

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

..1..2..1..1....1..1..1..1....1..1..1..1....1..1..2..1....1..1..1..1

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

..1..1..0..0....0..0..0..0....0..1..0..0....0..0..1..0....0..0..1..0

..0..0..1..1....1..1..1..1....0..1..1..1....1..1..1..0....1..1..1..0

CROSSREFS

Sequence in context: A144318 A230142 A247165 * A223433 A223593 A067223

Adjacent sequences:  A204077 A204078 A204079 * A204081 A204082 A204083

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 10 2012

STATUS

approved

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Last modified November 17 18:42 EST 2018. Contains 317276 sequences. (Running on oeis4.)