A298764 Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 5 or 8 king-move adjacent elements, with upper left element zero.

0, 4, 57, 957, 23932, 942727, 53950338, 4698205702, 620363350692

Offset

1,2

Comments

Diagonal of A298770.

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Cf. A298770.

Sequence in context: A156873 A320977 A071540 * A299562 A299459 A300103

Adjacent sequences: A298761 A298762 A298763 * A298765 A298766 A298767

Keyword

nonn

Author

R. H. Hardin, Jan 26 2018

Status

approved