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

89, 1097, 28959, 498825, 10288475, 190243099, 3674032121, 68795107993, 1301324910599, 24374459510955, 457521652409443, 8556633331945529, 160077250226203655, 2989991870865523923, 55846494235069318769

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