A297095 Number of n X n 0..1 arrays with no 1 adjacent to 4 king-move neighboring 1's.

2, 16, 351, 26278, 6316836, 4769336288, 11598374165583, 90071290640636405, 2231818836473290517838

Offset

1,1

Comments

Diagonal of A297102.

Links

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

Example

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

Crossrefs

Cf. A297102.

Sequence in context: A299907 A012610 A012721 * A289972 A179472 A009341

Adjacent sequences: A297092 A297093 A297094 * A297096 A297097 A297098

Keyword

nonn

Author

R. H. Hardin, Dec 25 2017

Status

approved