A298771 Number of n X n 0..1 arrays with every element equal to 1, 2, 4, 5 or 8 king-move adjacent elements, with upper left element zero.

0, 3, 15, 78, 682, 11320, 484813, 22160831, 2093453587, 397340932476

Offset

1,2

Comments

Diagonal of A298775.

Links

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

Example

Some solutions for n=6
..0..1..0..0..0..0. .0..1..0..0..0..1. .0..1..1..1..0..1. .0..0..0..0..0..0
..1..0..0..0..1..0. .1..0..1..1..1..0. .1..0..0..0..1..1. .0..1..0..0..0..1
..0..1..1..1..0..0. .0..0..1..1..1..0. .1..0..0..0..1..1. .0..0..1..1..1..0
..0..1..1..1..0..0. .0..0..1..1..1..0. .1..0..0..0..1..0. .0..0..1..1..1..0
..0..1..1..1..0..0. .0..1..0..0..0..1. .0..1..1..1..0..1. .1..0..1..1..1..0
..1..0..0..0..1..0. .0..0..0..0..1..0. .1..1..1..0..1..0. .0..1..0..0..0..1

Crossrefs

Cf. A298775.

Sequence in context: A227954 A104530 A297952 * A298576 A299568 A031884

Adjacent sequences: A298768 A298769 A298770 * A298772 A298773 A298774

Keyword

nonn

Author

R. H. Hardin, Jan 26 2018

Status

approved