A317598 Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

1, 8, 100, 3047, 218043, 40015089, 18167894481, 20471431125281, 58293522938785296

Offset

1,2

Comments

Diagonal of A317604.

Links

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

Example

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

Crossrefs

Cf. A317604.

Sequence in context: A302944 A060570 A215875 * A238947 A291536 A229452

Adjacent sequences: A317595 A317596 A317597 * A317599 A317600 A317601

Keyword

nonn

Author

R. H. Hardin, Aug 01 2018

Status

approved