A259420 Number of (n+1)X(n+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0001 0011 or 0111.

13, 243, 12953, 1990133, 873754597, 1101527291223, 3975872829274865, 41147590225188806309, 1220087829652769318601383, 103689338398592714772850061461, 25251868912730969096083539641411367

Offset: 1

Author

R. H. Hardin, Jun 26 2015

Keywords

• nonn

Comments

Diagonal of A259427

Examples

			Some solutions for n=3
..1..1..1..1....0..0..0..0....0..0..1..1....0..0..1..1....1..1..1..0
..0..0..0..0....1..0..0..1....0..0..0..0....0..0..1..0....1..0..1..0
..0..0..1..0....0..0..1..1....1..1..1..0....0..0..1..1....1..0..1..1
..1..1..1..1....0..0..0..1....1..0..1..0....1..0..0..0....1..1..1..0
		

Links

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

Crossrefs

Cf. A259427