A282309 Number of n X n 0..1 arrays with no 1 equal to more than four of its king-move neighbors.

2, 16, 419, 40024, 13473987, 15544631618, 63687929371004, 912607092957406137, 45732608217067088771407, 8039776012810034885371563139

Offset

1,1

Comments

Diagonal of A282316.

Links

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

Example

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

Crossrefs

Cf. A282316.

Sequence in context: A027871 A283408 A343428 * A009397 A229023 A009700

Adjacent sequences: A282306 A282307 A282308 * A282310 A282311 A282312

Keyword

nonn

Author

R. H. Hardin, Feb 11 2017

Status

approved