A300967 Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 3, 72, 5362, 1396701, 1248976325, 3830408271334, 40336079370455720, 1458512970584631160987, 181083690540906210546159511, 77197439558945056115280452740665

Offset

1,2

Comments

Diagonal of A300973.

Links

Table of n, a(n) for n=1..11.

Example

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

Crossrefs

Cf. A300973.

Sequence in context: A071645 A322189 A228712 * A332721 A332747 A202948

Adjacent sequences: A300964 A300965 A300966 * A300968 A300969 A300970

Keyword

nonn

Author

R. H. Hardin, Mar 17 2018

Status

approved