A297308 Number of n X n 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 or 2 neighboring 1's.

1, 7, 117, 3808, 484808, 200646607, 197589351469, 578079526400673, 5377924483062338484, 139752957415982420114129, 10302206214700301342887034910, 2267938084956284272782357464419480

Offset: 1

Author

R. H. Hardin, Dec 28 2017

Keywords

• nonn

Comments

Diagonal of A297314.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..17

Crossrefs

Cf. A297314.