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A187315 Half the number of (n+2)X9 binary arrays with each 3X3 subblock having sum 3, 4, 5 or 6 0
24602854, 6264576384, 1535446610156, 385878307185440, 96936541525346279, 24360553147588517588, 6123962812371625570408 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A187317

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

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

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

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

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

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

CROSSREFS

Sequence in context: A183791 A115533 A256013 * A083636 A124069 A257383

Adjacent sequences:  A187312 A187313 A187314 * A187316 A187317 A187318

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 08 2011

STATUS

approved

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Last modified May 26 17:16 EDT 2020. Contains 334630 sequences. (Running on oeis4.)