A235442 Number of (n+1)X(n+1) 0..1 arrays with the difference between each 2X2 subblock maximum and minimum lexicographically nondecreasing rowwise and columnwise

16, 382, 28962, 7017768, 5485253042, 13868068262164, 113555975474406500, 3012872125570872924612

Offset

1,1

Comments

Diagonal of A235449

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Sequence in context: A235672 A235729 A189766 * A343213 A340689 A302262

Adjacent sequences: A235439 A235440 A235441 * A235443 A235444 A235445

Keyword

nonn

Author

R. H. Hardin, Jan 10 2014

Status

approved