A299389 Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4, 6 or 8 king-move adjacent elements, with upper left element zero.

1, 4, 3, 63, 508, 2483, 112188, 5884463, 286590596, 77024397318

Offset

1,2

Comments

Diagonal of A299393.

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for n=6
..0..1..0..0..0..0. .0..0..1..1..0..0. .0..0..1..1..1..0. .0..0..0..0..1..0
..1..1..1..1..0..0. .0..0..0..0..0..0. .0..0..0..0..1..1. .0..0..1..1..1..1
..0..1..0..0..0..1. .1..0..0..0..0..1. .1..0..0..0..1..0. .1..0..0..0..1..0
..0..1..0..0..0..0. .1..0..0..0..0..1. .1..0..0..0..0..1. .0..0..0..0..1..0
..0..0..0..0..0..1. .1..1..1..0..1..1. .1..1..1..0..0..0. .1..0..0..0..0..0
..0..0..1..0..1..0. .0..1..0..1..1..0. .0..1..0..1..0..0. .0..1..0..1..0..0

Crossrefs

Cf. A299393.

Sequence in context: A273878 A013335 A298314 * A220556 A371687 A299188

Adjacent sequences: A299386 A299387 A299388 * A299390 A299391 A299392

Keyword

nonn

Author

R. H. Hardin, Feb 09 2018

Status

approved