A218758 Unmatched value maps: number of n X n binary arrays indicating the locations of corresponding elements not equal to any horizontal or vertical neighbor in a random 0..1 n X n array

1, 6, 90, 2942, 280850, 70915451, 48186998294, 87678602579068

Offset

1,2

Comments

Diagonal of A218765

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Sequence in context: A000680 A013297 A232979 * A219304 A305324 A265088

Adjacent sequences: A218755 A218756 A218757 * A218759 A218760 A218761

Keyword

nonn

Author

R. H. Hardin Nov 05 2012

Status

approved