A297078 Number of n X n 0..1 arrays with no 1 adjacent to 2 king-move neighboring 1's.

2, 12, 136, 6784, 1180260, 833228038, 2245841563645, 22323064130902079, 816825481568045498590, 109415592103170263245191759

Offset

1,1

Comments

Diagonal of A297085.

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Cf. A297085.

Sequence in context: A108996 A117513 A343439 * A185522 A119819 A330655

Adjacent sequences: A297075 A297076 A297077 * A297079 A297080 A297081

Keyword

nonn

Author

R. H. Hardin, Dec 25 2017

Status

approved