A253390 Number of (n+1)X(n+1) 0..1 arrays with every 2X2 subblock antidiagonal maximum minus diagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal minimum nondecreasing vertically.

16, 102, 174, 346, 666, 1318, 2726, 5396, 11392, 22634, 47926, 95464, 201644, 402272, 846688, 1690724, 3546388, 7086130, 14818262, 29621624, 61778428, 123532896, 257035176, 514085752, 1067445536, 2135305688, 4425565336, 8853923848

Offset: 1

Author

R. H. Hardin, Dec 31 2014

Keywords

• nonn

Comments

Diagonal of A253397

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..69