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A187438 Number of (n+1)X7 0..2 arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors 0
3022484, 3319295436, 3677337022406, 4086873166309438, 4538075433355553643 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A187441

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions for 3X7

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

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

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

CROSSREFS

Sequence in context: A224077 A114065 A268405 * A184374 A205932 A281447

Adjacent sequences:  A187435 A187436 A187437 * A187439 A187440 A187441

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 10 2011

STATUS

approved

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Last modified June 12 14:32 EDT 2021. Contains 344957 sequences. (Running on oeis4.)