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

1,1

Comments

Diagonal of A253397

Links

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

Example

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

Crossrefs

Sequence in context: A224155 A224406 A223016 * A264281 A240257 A199773

Adjacent sequences: A253387 A253388 A253389 * A253391 A253392 A253393

Keyword

nonn

Author

R. H. Hardin, Dec 31 2014

Status

approved