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A198207 Number of 2nX6 0..3 arrays with values 0..3 introduced in row major order and each element unequal to exactly two horizontal and vertical neighbors 1
658, 50729, 3603458, 276030525, 21989253467, 1791994477631, 148260119458624, 12388301166414053, 1042156486950351473, 88068293220220746165, 7464940011082766165729, 634039417143962239696103 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A198209

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..31

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A210091 A068260 A252365 * A171393 A349586 A023294

Adjacent sequences:  A198204 A198205 A198206 * A198208 A198209 A198210

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 22 2011

STATUS

approved

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Last modified December 3 18:19 EST 2021. Contains 349467 sequences. (Running on oeis4.)