A299222 Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

0, 4, 113, 5663, 766094, 281251424, 260938102438, 624662873923282, 3865535525302817693

Offset

1,2

Comments

Diagonal of A299228.

Links

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

Example

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

Crossrefs

Cf. A299228.

Sequence in context: A103499 A298331 A299394 * A300036 A199834 A194495

Adjacent sequences: A299219 A299220 A299221 * A299223 A299224 A299225

Keyword

nonn

Author

R. H. Hardin, Feb 05 2018

Status

approved