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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 0
16, 382, 28962, 7017768, 5485253042, 13868068262164, 113555975474406500, 3012872125570872924612 (list; graph; refs; listen; history; text; internal format)
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 * A302262 A302962 A302805

Adjacent sequences:  A235439 A235440 A235441 * A235443 A235444 A235445

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 10 2014

STATUS

approved

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Last modified October 17 16:42 EDT 2019. Contains 328120 sequences. (Running on oeis4.)