A183284 Half the number of nX3 binary arrays with the number of 1-1 horizontal, vertical, diagonal and antidiagonal adjacencies equal to the number of 0-0 adjacencies

1, 6, 1, 180, 116, 8016, 9746, 398126, 725872, 20910204, 50854089, 1137666502, 3437745554, 63460798680, 227195157189, 3607654634376, 14790377127600, 208205724243960, 952891467281892, 12165590563428240, 60941926764726246

Offset

1,2

Comments

Column 3 of A183289

Links

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

Example

Some solutions for 4X3 with a(1,1)=0
..0..1..1....0..0..0....0..1..1....0..0..1....0..0..0....0..1..1....0..1..0
..0..1..1....1..1..0....1..1..1....1..1..0....0..1..1....0..0..1....1..1..0
..0..0..1....1..0..1....0..0..0....1..0..1....0..1..1....0..1..0....0..1..0
..0..0..1....1..0..1....1..0..0....0..0..1....1..0..0....0..1..1....0..0..1

Crossrefs

Sequence in context: A303675 A266302 A352012 * A224476 A123147 A119831

Adjacent sequences: A183281 A183282 A183283 * A183285 A183286 A183287

Keyword

nonn

Author

R. H. Hardin Jan 03 2011

Status

approved