A299002 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.

1, 8, 94, 1977, 111695, 9369586, 1591404390, 667156890263, 490770543899625

Offset

1,2

Comments

Diagonal of A299008.

Links

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

Example

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

Crossrefs

Cf. A299008.

Sequence in context: A098269 A010565 A391555 * A299669 A080208 A297857

Adjacent sequences: A298999 A299000 A299001 * A299003 A299004 A299005

Keyword

nonn

Author

R. H. Hardin, Jan 31 2018

Status

approved