A299188 Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

1, 4, 3, 80, 1539, 11459, 848789, 122310309, 6602925250, 2215354712154

Offset

1,2

Comments

Diagonal of A299194.

Links

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

Example

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

Crossrefs

Cf. A299194.

Sequence in context: A299389 A220556 A371687 * A300026 A349589 A362736

Adjacent sequences: A299185 A299186 A299187 * A299189 A299190 A299191

Keyword

nonn

Author

R. H. Hardin, Feb 04 2018

Status

approved