A219304 Unchanging value maps: number of n X n binary arrays indicating the locations of corresponding elements unequal to no horizontal or vertical neighbor in a random 0..2 n X n array.

1, 6, 90, 3334, 326444, 89981627, 68906619754, 144049729095880

Offset: 1

Author

R. H. Hardin Nov 17 2012

Keywords

• nonn

Comments

Diagonal of A219310

Examples

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