A231355 Number of (n+1)X(n+1) 0..3 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with values 0..3 introduced in row major order

1, 5, 69, 2190, 151357, 22223936, 6484084119, 3749929770640

Offset

1,2

Comments

Diagonal of A231363

Links

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

Example

Some solutions for n=4
..0..0..0..0..0....0..0..0..0..1....0..0..0..1..1....0..1..1..1..2
..1..1..0..0..2....0..0..0..1..1....0..0..0..1..1....0..1..1..2..2
..1..1..1..2..2....1..1..1..1..2....0..0..0..2..2....0..0..2..2..2
..1..1..1..2..2....1..3..3..2..2....0..0..2..2..3....0..0..2..2..2
..1..1..1..2..2....3..3..3..2..2....0..2..2..3..3....0..2..2..2..2

Crossrefs

Sequence in context: A302543 A157038 A211393 * A145632 A299318 A051538

Adjacent sequences: A231352 A231353 A231354 * A231356 A231357 A231358

Keyword

nonn

Author

R. H. Hardin, Nov 08 2013

Status

approved