A298274 Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 4 or 5 king-move adjacent elements, with upper left element zero.

0, 4, 129, 10679, 3214459, 3328434344, 11799327975543, 143597352796799615, 5998900161419245960408

Offset

1,2

Comments

Diagonal of A298280.

Links

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

Example

Some solutions for n=4
..0..0..0..0. .0..0..1..0. .0..1..0..1. .0..0..1..0. .0..1..0..1
..0..1..1..0. .0..1..1..0. .0..1..1..0. .1..1..1..0. .1..0..1..0
..0..0..1..0. .0..1..1..0. .1..0..0..1. .0..0..1..0. .1..0..1..0
..1..1..0..0. .1..0..1..0. .1..1..0..0. .0..1..0..1. .0..0..0..1

Crossrefs

Cf. A298280.

Sequence in context: A057134 A041495 A188315 * A299136 A117897 A001425

Adjacent sequences: A298271 A298272 A298273 * A298275 A298276 A298277

Keyword

nonn

Author

R. H. Hardin, Jan 16 2018

Status

approved