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A187138 Number of (n+1)X8 0..2 arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces 0
332937, 189091422, 34994620836, 8616423081600, 1928394629936928, 456216633873575892 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A187140

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for 4X8

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

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

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

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

CROSSREFS

Sequence in context: A254358 A206658 A069337 * A185843 A261861 A234129

Adjacent sequences:  A187135 A187136 A187137 * A187139 A187140 A187141

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 05 2011

STATUS

approved

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Last modified December 5 22:37 EST 2019. Contains 329782 sequences. (Running on oeis4.)