A300938 Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1, 3, 5, 38, 248, 3873, 99717, 5562548, 556497081, 107105438462

Offset

1,2

Comments

Diagonal of A300944.

Links

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

Example

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

Crossrefs

Cf. A300944.

Sequence in context: A337858 A337859 A184314 * A183258 A077779 A176112

Adjacent sequences: A300935 A300936 A300937 * A300939 A300940 A300941

Keyword

nonn

Author

R. H. Hardin, Mar 16 2018

Status

approved