A300255 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

1, 8, 179, 10363, 1588195, 618957455, 620657860617, 1618706599440909, 10901101809945195194

Offset

1,2

Comments

Diagonal of A300259.

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Cf. A300259.

Sequence in context: A298995 A299742 A299662 * A108552 A221589 A317486

Adjacent sequences: A300252 A300253 A300254 * A300256 A300257 A300258

Keyword

nonn

Author

R. H. Hardin, Mar 01 2018

Status

approved