A300917 Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1, 3, 20, 593, 48588, 14914968, 13715723327, 40555879417852, 372826575580930236, 10763317686740172159278

Offset

1,2

Comments

Diagonal of A300923.

Links

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

Example

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

Crossrefs

Cf. A300923.

Sequence in context: A189603 A203228 A174972 * A089943 A108699 A162134

Adjacent sequences: A300914 A300915 A300916 * A300918 A300919 A300920

Keyword

nonn

Author

R. H. Hardin, Mar 15 2018

Status

approved