A298447 Number of n X n 0..1 arrays with every element equal to 1, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

0, 4, 0, 161, 5938, 255029, 112275165, 141892377970, 300456210546842

Offset

1,2

Comments

Diagonal of A298454.

Links

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

Example

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

Crossrefs

Cf. A298454.

Sequence in context: A129825 A267441 A264883 * A138734 A265596 A119010

Adjacent sequences: A298444 A298445 A298446 * A298448 A298449 A298450

Keyword

nonn

Author

R. H. Hardin, Jan 19 2018

Status

approved