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A187962 Half the number of (n+2)X9 binary arrays with no 3X3 subblock having a sum equal to any horizontal or vertical neighbor 3X3 subblock sum 0
7626496, 86157696, 860108472, 7359939574, 98476432408 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A187964

LINKS

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

EXAMPLE

Some solutions for 4X9 with a(1,1)=0

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

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

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

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

CROSSREFS

Sequence in context: A237156 A233605 A204803 * A080340 A192105 A233597

Adjacent sequences:  A187959 A187960 A187961 * A187963 A187964 A187965

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 16 2011

STATUS

approved

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Last modified September 24 19:49 EDT 2022. Contains 356949 sequences. (Running on oeis4.)