A219149 Unchanging value maps: number of n X n binary arrays indicating the locations of corresponding elements unequal to no horizontal, antidiagonal or vertical neighbor in a random 0..1 n X n array

1, 4, 32, 531, 20400, 1707676, 313358793, 126050637852, 111079912880127, 214001518780274766

Offset

1,2

Comments

Diagonal of A219156

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Sequence in context: A036442 A186339 A086899 * A013041 A006024 A118995

Adjacent sequences: A219146 A219147 A219148 * A219150 A219151 A219152

Keyword

nonn

Author

R. H. Hardin Nov 12 2012

Status

approved