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

34, 250, 3305, 31428, 343035, 3437801, 35629548, 360327392, 3674032121, 37171418048, 376812203313, 3809267878552, 38525903428706, 389213738128583, 3932484616050161, 39713438364928384, 401069370226611064

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