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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

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

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

Adjacent sequences:  A235755 A235756 A235757 * A235759 A235760 A235761

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 15 2014

STATUS

approved

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Last modified September 28 10:48 EDT 2021. Contains 347714 sequences. (Running on oeis4.)