A300599 Number of n X n 0..1 arrays with every element equal to 0, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1, 3, 6, 42, 615, 16629, 1056816, 125507384, 31211394832, 15348688086725

Offset

1,2

Comments

Diagonal of A300605.

Links

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

Example

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

Crossrefs

Cf. A300605.

Sequence in context: A085696 A079095 A125889 * A002028 A202858 A116315

Adjacent sequences: A300596 A300597 A300598 * A300600 A300601 A300602

Keyword

nonn

Author

R. H. Hardin, Mar 09 2018

Status

approved