A300132 Number of n X n 0..1 arrays with every element equal to 0, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

1, 1, 16, 27, 2156, 98708, 20405641, 11565870189, 18502726008627, 89752056907627200

Offset

1,3

Comments

Diagonal of A300138.

Links

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

Example

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

Crossrefs

Cf. A300138.

Sequence in context: A073396 A338093 A302553 * A101857 A350302 A184039

Adjacent sequences: A300129 A300130 A300131 * A300133 A300134 A300135

Keyword

nonn

Author

R. H. Hardin, Feb 26 2018

Status

approved