A183370 Number of nX3 binary arrays with no element equal to the mod 3 sum of its diagonal and antidiagonal neighbors

1, 4, 6, 16, 30, 64, 165, 361, 875, 2116, 5460, 13924, 36720, 97344, 266895, 727609, 2029885, 5654884, 16014834, 45265984, 129279458, 368947264, 1060159545, 3044280625, 8779570735, 25310900836, 73171312896, 211476737956, 612259440564

Offset

1,2

Comments

Column 3 of A183374

Links

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

Example

Some solutions for 5X3
..0..1..0....1..1..1....0..0..0....1..0..1....1..0..1....0..1..0....1..0..1
..1..1..1....0..0..0....1..1..1....1..0..1....1..0..1....1..1..1....1..0..1
..0..1..0....1..1..1....0..0..0....0..0..0....1..0..1....1..1..1....0..0..0
..0..0..0....1..0..1....1..0..1....0..1..0....0..0..0....0..1..0....1..1..1
..1..1..1....1..1..1....1..0..1....0..1..0....1..1..1....0..1..0....0..0..0

Crossrefs

Sequence in context: A174804 A081487 A099430 * A113883 A036748 A162485

Adjacent sequences: A183367 A183368 A183369 * A183371 A183372 A183373

Keyword

nonn

Author

R. H. Hardin Jan 04 2011

Status

approved