A298913 Number of n X n 0..1 arrays with every element equal to 0, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

1, 1, 1, 3, 7, 14, 40, 168, 873, 5632, 63538, 1026354, 20200595, 622554839, 29122695476, 1747360635695, 149225079090933

Offset

1,4

Comments

Diagonal of A298917.

Links

Table of n, a(n) for n=1..17.

Example

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

Crossrefs

Cf. A298917.

Sequence in context: A147006 A146936 A184264 * A266019 A146155 A106363

Adjacent sequences: A298910 A298911 A298912 * A298914 A298915 A298916

Keyword

nonn

Author

R. H. Hardin, Jan 29 2018

Status

approved