A183371 Number of nX4 binary arrays with no element equal to the mod 3 sum of its diagonal and antidiagonal neighbors

1, 9, 16, 49, 64, 144, 729, 2304, 6724, 22500, 89401, 368449, 1399489, 5345344, 21501769, 87796900, 354531241, 1422345796, 5746246416, 23369542641, 94966283556, 385048793529, 1561870063504, 6344716152384, 25783758328441

Offset

1,2

Comments

Column 4 of A183374

Links

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

Example

Some solutions for 5X4
..0..0..0..0....0..0..0..0....0..1..0..0....1..0..0..0....0..1..0..1
..0..1..1..0....1..1..1..1....1..1..1..1....0..0..1..1....0..1..0..1
..1..1..1..1....0..0..0..0....0..1..0..1....1..1..0..1....0..1..0..1
..1..1..1..0....1..1..1..1....0..0..1..0....0..0..1..1....0..1..0..1
..0..1..0..0....0..0..0..0....1..0..1..0....1..0..0..0....0..1..0..1

Crossrefs

Sequence in context: A203595 A187087 A072861 * A225528 A039785 A303692

Adjacent sequences: A183368 A183369 A183370 * A183372 A183373 A183374

Keyword

nonn

Author

R. H. Hardin Jan 04 2011

Status

approved