A231508 Number of n X n 0..1 arrays with no element less than a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors

2, 6, 78, 2594, 256846, 97188562, 108221463798, 354675080084329, 3751188890796004947, 124821633675711741855688

Offset

1,1

Comments

Diagonal of A231515

Links

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

Example

Some solutions for n=4
..1..1..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..1
..1..0..0..0....1..0..0..1....0..1..0..0....0..0..0..1....0..0..0..0
..1..0..0..0....0..1..1..0....1..0..0..0....0..0..0..0....0..1..0..0
..0..0..0..1....0..0..0..0....0..0..0..0....0..0..1..0....0..0..1..0

Crossrefs

Sequence in context: A000721 A262279 A327052 * A136306 A274825 A376059

Adjacent sequences: A231505 A231506 A231507 * A231509 A231510 A231511

Keyword

nonn

Author

R. H. Hardin, Nov 09 2013

Status

approved