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A198282
Number of 2n X 10 0..2 arrays with values 0..2 introduced in row major order and each element equal to exactly two horizontal and vertical neighbors.
1
8, 190, 4588, 112750, 2823604, 70004726, 1748785516, 43705413710, 1092621380500, 27317384777366, 682990333610700, 17076690802445486, 426968760440748852, 10675538566342917910, 266921663443974490508, 6673873780235914735374
OFFSET
1,1
COMMENTS
Column 5 of A198285.
LINKS
EXAMPLE
Some solutions for n=3
..0..0..1..1..2..2..0..0..0..0....0..0..0..0..1..1..2..2..2..2
..0..0..1..1..2..2..0..2..2..0....0..2..2..0..1..1..2..0..0..2
..1..1..2..2..1..1..0..2..2..0....0..2..2..0..2..2..2..0..0..2
..1..1..2..2..1..1..0..0..0..0....0..1..1..0..2..0..0..2..2..2
..2..2..1..1..0..0..2..2..1..1....0..1..1..0..2..0..0..2..1..1
..2..2..1..1..0..0..2..2..1..1....0..0..0..0..2..2..2..2..1..1
CROSSREFS
Cf. A198285.
Sequence in context: A354407 A244438 A272529 * A177147 A366150 A251669
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 23 2011
STATUS
approved