A241363 Number of n X n 0..2 arrays with no element equal to fewer vertical neighbors than horizontal neighbors, with new values 0..2 introduced in row major order.

1, 7, 460, 169982, 332185927, 3437694358689, 188148208461270141, 54467029568686929640819

Offset

1,2

Comments

Diagonal of A241370.

Links

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

Example

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

Crossrefs

Cf. A241370.

Sequence in context: A024097 A203060 A261479 * A196540 A215890 A160374

Adjacent sequences: A241360 A241361 A241362 * A241364 A241365 A241366

Keyword

nonn

Author

R. H. Hardin, Apr 20 2014

Status

approved