A300805 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1, 8, 170, 9504, 1415898, 559634028, 585611214958, 1623186113355468, 11918444465082418938, 231853794250990035322072

Offset: 1

Author

R. H. Hardin, Mar 13 2018

Keywords

• nonn

Comments

Diagonal of A300811.

Examples

			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
..1..1..1..0..1. .0..1..1..0..1. .1..0..1..1..0. .0..1..1..1..0
..1..0..1..0..1. .0..0..1..0..0. .0..1..0..1..1. .1..0..0..0..1
..0..0..0..1..0. .1..0..1..1..1. .0..0..0..1..0. .0..1..0..1..0
..1..1..1..1..0. .0..0..1..0..0. .0..0..1..0..1. .1..1..0..0..1
		

Crossrefs

Cf. A300811.