A301444 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1, 8, 171, 9541, 1423344, 564002959, 592006690060, 1646995545166039, 12145346382857661327, 237428255410557186948107

Offset: 1

Author

R. H. Hardin, Mar 21 2018

Keywords

• nonn

Comments

Diagonal of A301450.

Examples

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

Crossrefs

Cf. A301450.