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A186804 Number of (n+2)X9 binary arrays with no 3X3 subblock commuting with any horizontal or vertical neighbor 3X3 subblock 0
117671951, 47657171957, 19839195220290, 8263791225579948, 3439855711337907764 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A186806

LINKS

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

EXAMPLE

Some solutions for 4X9

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

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

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

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

CROSSREFS

Sequence in context: A206062 A157770 A195282 * A344632 A015380 A250458

Adjacent sequences:  A186801 A186802 A186803 * A186805 A186806 A186807

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 26 2011

STATUS

approved

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Last modified January 28 21:21 EST 2022. Contains 350668 sequences. (Running on oeis4.)