A200802 Number of n X n 0..2 arrays with no average of any element and its diagonal, antidiagonal, horizontal and vertical neighbors equal to one.

2, 62, 4420, 2869182, 16571687222

Offset

1,1

Comments

Diagonal of A200809.

Links

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

Example

Some solutions for 3 X 3
..0..1..1....1..2..1....0..0..0....1..1..1....0..0..2....0..2..1....2..2..0
..0..1..0....1..2..2....2..0..0....2..1..2....0..0..1....2..1..2....1..2..2
..0..0..1....2..1..2....1..0..2....1..1..1....1..0..2....2..2..0....1..1..0

Crossrefs

Cf. A200809.

Sequence in context: A091817 A239786 A209183 * A262005 A296278 A239744

Adjacent sequences: A200799 A200800 A200801 * A200803 A200804 A200805

Keyword

nonn

Author

R. H. Hardin Nov 22 2011

Status

approved