A235672 Number of (n+1)X(n+1) 0..1 arrays with the difference between each 2X2 subblock maximum and minimum lexicographically nondecreasing columnwise and nonincreasing rowwise.

16, 380, 28584, 6894210, 5376199876, 13578805464958, 111141360154581108, 2948319928633417670416, 253497281472306754538416318, 70644048705639953560633398930712

Offset: 1

Author

R. H. Hardin, Jan 13 2014

Keywords

• nonn

Comments

Diagonal of A235679

Examples

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