A303191 Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

1, 3, 12, 46, 523, 8250, 164295, 6303961, 332058205, 27569938407, 3963913990343, 828978948856945

Offset

1,2

Comments

Diagonal of A303197.

Links

Table of n, a(n) for n=1..12.

Example

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

Crossrefs

Cf. A303197.

Sequence in context: A264514 A344684 A216946 * A176310 A368030 A077829

Adjacent sequences: A303188 A303189 A303190 * A303192 A303193 A303194

Keyword

nonn

Author

R. H. Hardin, Apr 19 2018

Status

approved