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A183321 Number of nX9 binary arrays with an element zero only if there are an even number of ones to its left and an even number of ones above it 1
89, 1097, 28959, 498825, 10288475, 190243099, 3674032121, 68795107993, 1301324910599, 24374459510955, 457521652409443, 8556633331945529, 160077250226203655, 2989991870865523923, 55846494235069318769 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 9 of A183322

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

EXAMPLE

Some solutions for 5X9

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

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

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

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

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

CROSSREFS

Sequence in context: A103545 A118368 A197399 * A264253 A219929 A226544

Adjacent sequences:  A183318 A183319 A183320 * A183322 A183323 A183324

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 03 2011

STATUS

approved

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Last modified July 1 07:17 EDT 2022. Contains 354952 sequences. (Running on oeis4.)