A200571 Number of n X n 0..2 arrays with no average of any element and its horizontal and vertical neighbors equal to one

2, 36, 2174, 938128, 2421467558, 36460159508108

Offset

1,1

Comments

Diagonal of A200579

Links

Table of n, a(n) for n=1..6.

Example

Some solutions for n=3
..1..2..2....0..0..2....2..0..2....2..0..0....2..0..1....2..2..0....0..2..0
..2..2..1....0..0..2....0..2..0....2..0..2....0..2..0....0..1..2....2..1..2
..2..2..2....2..2..1....2..2..2....1..2..0....2..2..0....2..2..0....2..0..2

Crossrefs

Sequence in context: A126934 A303503 A178949 * A213985 A203021 A319507

Adjacent sequences: A200568 A200569 A200570 * A200572 A200573 A200574

Keyword

nonn

Author

R. H. Hardin Nov 19 2011

Status

approved