A318085 Number of nXn 0..1 arrays with every element unequal to 0, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1, 2, 2, 47, 493, 10843, 504606, 44408035, 5866156032, 1303983775279

Offset

1,2

Comments

Diagonal of A318091.

Links

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

Example

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

Crossrefs

Cf. A318091.

Sequence in context: A222661 A015167 A086204 * A345267 A316090 A345463

Adjacent sequences: A318082 A318083 A318084 * A318086 A318087 A318088

Keyword

nonn

Author

R. H. Hardin, Aug 16 2018

Status

approved