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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 0
16, 380, 28584, 6894210, 5376199876, 13578805464958, 111141360154581108, 2948319928633417670416, 253497281472306754538416318, 70644048705639953560633398930712 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A235679
LINKS
EXAMPLE
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
CROSSREFS
Sequence in context: A264073 A333581 A201617 * A235729 A189766 A235442
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 13 2014
STATUS
approved

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Last modified March 28 09:04 EDT 2024. Contains 371240 sequences. (Running on oeis4.)