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A224650 Number of (n+2)X9 0..1 matrices with each 3X3 subblock having the same population 0
175616, 209216, 250304, 303488, 430208, 630080, 983168, 1890368, 3876992, 8594432, 21633920, 56280896, 151174016, 425070656, 1208783744, 3475570688, 10157902208, 29817258560, 87902960768, 260802882368 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A224651

LINKS

Table of n, a(n) for n=1..20.

EXAMPLE

Some solutions for n=2

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

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

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

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

CROSSREFS

Sequence in context: A252843 A173705 A092012 * A262822 A273727 A203406

Adjacent sequences: A224647 A224648 A224649 * A224651 A224652 A224653

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 13 2013

STATUS

approved

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Last modified December 6 21:00 EST 2022. Contains 358648 sequences. (Running on oeis4.)