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A187136 Number of (n+1)X6 0..2 arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces 1
12609, 1853892, 99203418, 7020258336, 440941355208, 29716252404984, 1928394629936928, 127632346709629266, 8355847987373669514, 550355304750006790962, 36131509292425042328892, 2376245166849996273772092 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A187140

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..28

EXAMPLE

Some solutions for 4X6

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

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

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

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

CROSSREFS

Sequence in context: A246231 A248709 A261860 * A185841 A219332 A254262

Adjacent sequences:  A187133 A187134 A187135 * A187137 A187138 A187139

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 05 2011

STATUS

approved

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Last modified October 1 17:45 EDT 2020. Contains 337444 sequences. (Running on oeis4.)