A231434 Number of (n+2)X(n+2) 0..3 arrays with no element unequal to a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors, with values 0..3 introduced in row major order

1, 4, 21, 182, 4450, 133646, 7859324

Offset

1,2

Comments

Diagonal of A231441

Links

Table of n, a(n) for n=1..7.

Example

Some solutions for n=5
..0..0..1..1..1..1..1....0..0..1..1..1..0..0....0..0..1..1..2..2..2
..0..0..1..1..1..1..1....0..0..1..1..1..0..0....0..0..1..1..2..2..2
..0..0..0..1..1..1..1....0..0..1..1..1..1..0....0..0..0..1..1..2..2
..0..0..0..1..1..1..1....0..0..1..1..1..1..0....0..0..0..1..1..3..3
..1..1..1..0..0..0..0....0..0..0..1..1..0..0....0..0..0..1..3..3..3
..1..1..1..0..0..0..0....0..0..0..0..0..0..0....0..0..1..1..3..3..3
..1..1..1..0..0..0..0....0..0..0..0..0..0..0....0..0..1..1..3..3..3

Crossrefs

Sequence in context: A306067 A230682 A231220 * A221370 A224500 A158108

Adjacent sequences: A231431 A231432 A231433 * A231435 A231436 A231437

Keyword

nonn

Author

R. H. Hardin, Nov 09 2013

Status

approved