A183424 Half the number of n X n 0..2 arrays with no element equal its row sum plus its column sum mod 3

1, 9, 256, 62694, 16777215

Offset

1,2

Comments

Diagonal of A183429

Links

Table of n, a(n) for n=1..5.

Example

Some solutions for 4X4
..2..0..0..1....1..0..0..1....0..1..0..0....0..0..2..0....0..0..1..0
..0..0..1..0....2..1..1..2....0..1..1..2....1..0..1..0....1..0..0..2
..2..0..2..0....0..0..0..0....0..0..1..0....0..1..1..2....2..0..2..2
..2..1..2..2....1..1..1..1....0..2..2..1....2..1..0..0....0..1..1..2

Crossrefs

Sequence in context: A025133 A193129 A183493 * A160073 A157575 A072158

Adjacent sequences: A183421 A183422 A183423 * A183425 A183426 A183427

Keyword

nonn

Author

R. H. Hardin Jan 04 2011

Status

approved