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A235758 Number of (n+1)X(n+1) 0..1 arrays with the sum of each 2X2 subblock two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise 0
16, 216, 6882, 375746, 44717902, 10315124920, 5613901408380, 8080185176809664 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A235765
LINKS
EXAMPLE
Some solutions for n=3
..1..0..1..1....1..1..1..1....0..1..1..1....1..1..1..0....0..1..0..0
..0..0..0..0....0..1..1..0....1..0..1..0....1..1..1..1....1..0..1..1
..0..1..0..0....0..0..0..1....0..0..1..1....0..1..0..1....0..1..0..0
..0..0..0..0....0..1..1..0....1..0..0..0....0..1..0..1....0..0..1..1
CROSSREFS
Sequence in context: A159739 A181247 A138454 * A086650 A137701 A080514
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 15 2014
STATUS
approved

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Last modified March 3 18:58 EST 2024. Contains 370512 sequences. (Running on oeis4.)