A203284 Number of nX7 binary arrays with every element neighboring horizontally or vertically both a 0 and a 1

0, 256, 6528, 311364, 14644480, 674752576, 31747280900, 1482014064400, 69426540922112, 3248414978337424, 152051978649072512, 7116397401627306244, 333073866254926765092, 15589003682173336070436, 729619114019766057116208

Offset

1,2

Comments

Column 7 of A203285

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=3
..1..1..0..1..1..0..0....1..0..1..1..0..0..1....1..0..0..1..0..0..0
..0..1..0..0..0..0..1....1..0..0..0..1..1..1....1..0..0..1..1..1..1
..0..1..0..1..1..0..1....1..0..1..1..1..0..0....1..0..0..1..1..0..0

Crossrefs

Sequence in context: A283339 A128698 A283576 * A321832 A351196 A016900

Adjacent sequences: A203281 A203282 A203283 * A203285 A203286 A203287

Keyword

nonn

Author

R. H. Hardin Dec 31 2011

Status

approved