A230169 Number of n X n 0..2 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least one element with value 2-x(i,j)

0, 27, 3787, 4722977, 49754476927, 4381081731832923, 3274958849115023706081

Offset

1,2

Comments

Diagonal of A230176

Links

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

Example

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

Crossrefs

Sequence in context: A166750 A195374 A238698 * A271240 A223327 A211927

Adjacent sequences: A230166 A230167 A230168 * A230170 A230171 A230172

Keyword

nonn

Author

R. H. Hardin, Oct 11 2013

Status

approved