A203372 Number of (n+1)X(n+1) 0..1 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements.

12, 164, 5208, 387324, 67731264, 27913330472, 27149753088792, 62383316832685348, 338853014329060508760, 4353185098169744392741448, 132316928041105714306034574480, 9518293354852895518368238072987352

Offset: 1

Author

R. H. Hardin Dec 31 2011

Keywords

• nonn

Comments

Diagonal of A203378

Examples

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

Links

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