A237734 Number of (n+2)X(1+2) 0..1 arrays with the (lower) median of each row and column nondecreasing

144, 790, 3720, 18284, 83776, 389862, 1747320, 7872964, 34692768, 153039484, 665606032, 2892713880, 12452328704, 53523477382, 228514634712, 973914704084, 4130296829920, 17485093214484, 73743666735728, 310486705313128

Offset

1,1

Comments

Column 1 of A237738

Links

R. H. Hardin, Table of n, a(n) for n = 1..69

Example

Some solutions for n=5
..0..1..0....0..1..0....0..0..1....1..0..1....0..0..0....1..0..0....0..1..0
..1..0..0....1..0..0....0..0..0....1..1..0....0..0..0....0..0..1....0..0..0
..1..0..0....1..0..0....0..1..0....1..1..0....1..0..0....0..0..0....0..0..0
..1..0..0....1..0..0....0..0..1....1..1..0....0..0..1....0..0..1....0..1..1
..0..0..0....0..0..1....1..1..0....1..1..1....0..0..1....1..0..0....1..0..1
..0..0..0....0..1..1....1..1..1....1..1..1....1..0..1....0..1..0....0..1..1
..0..1..1....0..1..1....1..1..1....0..1..1....1..1..1....1..0..1....0..1..1

Crossrefs

Sequence in context: A112067 A210724 A237738 * A234091 A234084 A223235

Adjacent sequences: A237731 A237732 A237733 * A237735 A237736 A237737

Keyword

nonn

Author

R. H. Hardin, Feb 12 2014

Status

approved