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A198283 Number of 2nX12 0..2 arrays with values 0..2 introduced in row major order and each element equal to exactly two horizontal and vertical neighbors 1
16, 700, 31718, 1478756, 70004726, 3337609528, 158791292898, 7572454386112, 361223237102398, 17233549055351780, 822235886561754748, 39230600563964575264, 1871782716035228820002, 89307446755046275015160 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A198285

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..20

EXAMPLE

Some solutions for n=3

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

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

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

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

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

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

CROSSREFS

Sequence in context: A222139 A036513 A123824 * A201622 A220809 A221023

Adjacent sequences:  A198280 A198281 A198282 * A198284 A198285 A198286

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 23 2011

STATUS

approved

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Last modified October 25 01:33 EDT 2014. Contains 248517 sequences.