A302947 Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

0, 3, 86, 6531, 2104533, 2766909379, 13578993819785, 252836915021232264, 18036285050227905448214, 4921162186957679442128426852

Offset: 1

Author

R. H. Hardin, Apr 16 2018

Keywords

• nonn

Comments

Diagonal of A302953.

Examples

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

Crossrefs

Cf. A302953.