A298455 Number of n X n 0..1 arrays with every element equal to 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

0, 1, 8, 219, 35980, 19100497, 39291988976, 290849365371077, 7804886774633048676

Offset

1,3

Comments

Diagonal of A298461.

Links

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

Example

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

Crossrefs

Cf. A298461.

Sequence in context: A232157 A305517 A298964 * A055350 A183261 A316954

Adjacent sequences: A298452 A298453 A298454 * A298456 A298457 A298458

Keyword

nonn

Author

R. H. Hardin, Jan 19 2018

Status

approved