A299459 Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

0, 4, 57, 1013, 52002, 4175049, 546467591, 209501211322, 137356353424270

Offset

1,2

Comments

Diagonal of A299465.

Links

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

Example

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

Crossrefs

Cf. A299465.

Sequence in context: A071540 A298764 A299562 * A300103 A358687 A209317

Adjacent sequences: A299456 A299457 A299458 * A299460 A299461 A299462

Keyword

nonn

Author

R. H. Hardin, Feb 10 2018

Status

approved