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

Author

R. H. Hardin Jan 04 2011

Keywords

• nonn

Comments

Column 4 of A183374

Examples

			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
		

Links

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