A300140 Number of n X n 0..1 arrays with every element equal to 1, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

0, 4, 1, 246, 13182, 1048462, 783899343, 1507189100633, 6587404783601123

Offset

1,2

Comments

Diagonal of A300146.

Links

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

Example

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

Crossrefs

Cf. A300146.

Sequence in context: A094423 A262404 A299522 * A347554 A298939 A240098

Adjacent sequences: A300137 A300138 A300139 * A300141 A300142 A300143

Keyword

nonn

Author

R. H. Hardin, Feb 26 2018

Status

approved