A205311 Number of (n+1) X (n+1) 0..1 arrays with every 2 X 2 subblock having the same number of equal edges, and new values 0..1 introduced in row major order.

8, 84, 2606, 193664, 33865634, 13956665238, 13574876544398, 31191658416342676, 169426507164530254382, 2176592549084872196370726, 66158464020552857153017287242, 4759146677426447759184119036493678

Offset: 1

Author

R. H. Hardin Jan 25 2012

Keywords

• nonn

Comments

Diagonal of A205318.

Examples

			Some solutions for n=4
..0..1..1..1..0....0..1..0..0..0....0..1..1..0..0....0..0..0..0..1
..1..1..0..1..0....1..1..0..1..0....0..1..0..0..1....0..1..0..1..1
..1..0..0..0..0....0..0..0..0..0....1..1..1..0..0....0..1..1..1..0
..0..0..1..0..1....1..1..0..1..0....0..0..1..0..1....0..1..0..1..1
..0..1..1..0..0....1..0..0..1..0....0..1..1..0..1....1..1..1..1..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..14

Crossrefs

Cf. A205318.