A299315 Number of n X n 0..1 arrays with every element equal to 0, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

1, 1, 15, 12, 1306, 44381, 7885194, 3745566028, 4909629881306

Offset

1,3

Comments

Diagonal of A299321.

Links

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

Example

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

Crossrefs

Cf. A299321.

Sequence in context: A273445 A338069 A195533 * A072348 A317422 A129786

Adjacent sequences: A299312 A299313 A299314 * A299316 A299317 A299318

Keyword

nonn

Author

R. H. Hardin, Feb 06 2018

Status

approved