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

16, 216, 6882, 375746, 44717902, 10315124920, 5613901408380, 8080185176809664

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