A300103 Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

0, 4, 57, 1041, 59014, 7603542, 1781758380, 1206489116900, 2190341526343270

Offset

1,2

Comments

Diagonal of A300108.

Links

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

Example

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

Crossrefs

Cf. A300108.

Sequence in context: A298764 A299562 A299459 * A358687 A209317 A231491

Adjacent sequences: A300100 A300101 A300102 * A300104 A300105 A300106

Keyword

nonn

Author

R. H. Hardin, Feb 25 2018

Status

approved