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A183319 Number of nX7 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
34, 250, 3305, 31428, 343035, 3437801, 35629548, 360327392, 3674032121, 37171418048, 376812203313, 3809267878552, 38525903428706, 389213738128583, 3932484616050161, 39713438364928384, 401069370226611064 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A183322

LINKS

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

EXAMPLE

Some solutions for 5X7

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

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

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

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

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

CROSSREFS

Sequence in context: A281052 A020872 A302474 * A190422 A209951 A209944

Adjacent sequences:  A183316 A183317 A183318 * A183320 A183321 A183322

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 03 2011

STATUS

approved

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Last modified June 30 06:00 EDT 2022. Contains 354914 sequences. (Running on oeis4.)