A299136 Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

0, 4, 129, 11179, 3426869, 3643124959, 13311860331263, 167720233672628013, 7285451454600766025388

Offset

1,2

Comments

Diagonal of A299142.

Links

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

Example

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

Crossrefs

Cf. A299142.

Sequence in context: A041495 A188315 A298274 * A117897 A001425 A050284

Adjacent sequences: A299133 A299134 A299135 * A299137 A299138 A299139

Keyword

nonn

Author

R. H. Hardin, Feb 03 2018

Status

approved