A298064 Number of n X n 0..1 arrays with every element equal to 2, 3, 4 or 6 king-move adjacent elements, with upper left element zero.

0, 1, 4, 59, 3500, 532282, 180902016, 162145163369, 357772266192414

Offset

1,3

Comments

Diagonal of A298070.

Links

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

Example

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

Crossrefs

Cf. A298070.

Sequence in context: A194534 A331712 A026586 * A298713 A058173 A074835

Adjacent sequences: A298061 A298062 A298063 * A298065 A298066 A298067

Keyword

nonn

Author

R. H. Hardin, Jan 11 2018

Status

approved