A298314 Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4 or 6 king-move adjacent elements, with upper left element zero.

1, 4, 3, 63, 507, 2466, 111137, 5833295, 281897638, 75712523939

Offset

1,2

Comments

Diagonal of A298320.

Links

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

Example

Some solutions for n=7
..0..1..0..1..0..1..0. .0..1..0..1..1..1..0. .0..1..0..0..1..0..0
..1..0..0..0..0..0..1. .1..1..1..0..1..1..0. .1..0..0..0..1..0..0
..1..1..0..1..0..1..1. .1..0..0..0..0..0..0. .0..0..0..1..1..0..1
..1..0..0..0..0..0..1. .1..1..1..0..1..1..0. .0..1..0..0..1..0..1
..1..0..0..0..1..1..0. .1..1..1..0..1..1..0. .0..1..0..1..1..0..0
..1..1..0..1..0..1..1. .1..0..0..1..0..0..0. .1..1..0..0..1..0..1
..0..1..1..1..1..1..1. .0..1..0..0..1..0..1. .1..1..0..0..1..0..1

Crossrefs

Cf. A298320.

Sequence in context: A328193 A273878 A013335 * A299389 A220556 A371687

Adjacent sequences: A298311 A298312 A298313 * A298315 A298316 A298317

Keyword

nonn

Author

R. H. Hardin, Jan 17 2018

Status

approved