A298162 Number of n X n 0..1 arrays with every element equal to 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero.

0, 1, 1, 4, 10, 62, 624, 95458, 6564438, 7857314649

Offset

1,4

Comments

Diagonal of A298167.

Links

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

Example

Some solutions for n=7
..0..0..0..0..0..1..1. .0..0..0..1..1..1..1. .0..0..0..0..0..1..1
..0..0..1..0..0..1..1. .0..0..0..1..1..1..1. .0..0..1..0..0..1..1
..0..1..1..1..0..1..1. .0..0..0..1..1..1..1. .0..1..1..1..0..1..1
..0..0..1..1..1..0..0. .1..1..1..0..0..0..0. .0..0..1..1..0..1..1
..0..0..0..0..1..0..0. .1..1..1..0..0..0..0. .0..0..1..0..0..0..1
..1..1..1..0..0..1..1. .0..0..0..1..1..1..1. .0..0..1..1..0..1..1
..1..1..1..0..0..1..1. .0..0..0..1..1..1..1. .0..0..1..1..1..1..1

Crossrefs

Cf. A298167.

Sequence in context: A124724 A362705 A323870 * A203226 A300642 A146304

Adjacent sequences: A298159 A298160 A298161 * A298163 A298164 A298165

Keyword

nonn

Author

R. H. Hardin, Jan 14 2018

Status

approved