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A204299 Number of nX6 0..3 arrays with every element neighboring horizontally or vertically both a 0 and a 1, and 2 introduced before 3 in row major order 1
0, 212, 19540, 1972288, 277234340, 47309058644, 5589659640640, 870640738340900, 123996249589648356, 17750283049298827840, 2576653369311868344772, 370733913903692365171892, 53509487787359717704828880 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 6 of A204301

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..30

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A250326 A344423 A238023 * A332121 A083962 A007942

Adjacent sequences:  A204296 A204297 A204298 * A204300 A204301 A204302

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 14 2012

STATUS

approved

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Last modified July 25 19:28 EDT 2021. Contains 346291 sequences. (Running on oeis4.)