A282784 Number of n X n 0..1 arrays with no 1 equal to more than one of its king-move neighbors, with the exception of exactly one element.

0, 0, 73, 1952, 208559, 34974844, 12713143876, 10031326473244, 16844842566734425, 61957626701788646084, 497581272671041376917187

Offset

1,3

Comments

Diagonal of A282791.

Links

Table of n, a(n) for n=1..11.

Example

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

Crossrefs

Cf. A282791.

Sequence in context: A332948 A224505 A217286 * A332912 A361491 A017789

Adjacent sequences: A282781 A282782 A282783 * A282785 A282786 A282787

Keyword

nonn

Author

R. H. Hardin, Feb 21 2017

Status

approved