A237735 Number of (n+2) X (2+2) 0..1 arrays with the (lower) median of each row and column nondecreasing.

790, 13259, 105639, 1707200, 13980344, 219064013, 1853523145, 28043965682, 244945512750, 3576754641447, 32147201401103, 454105760467216, 4184801089025920, 57381572683004213, 540369123875778033

Offset

1,1

Comments

Column 2 of A237738.

Links

R. H. Hardin, Table of n, a(n) for n = 1..33

Example

Some solutions for n=3
..0..0..1..0....1..0..0..1....1..0..0..1....0..0..0..0....0..1..0..0
..0..0..0..0....0..0..0..0....1..0..0..0....1..0..0..1....1..0..0..0
..1..1..0..0....0..1..1..0....0..1..1..1....0..0..0..0....0..0..0..1
..0..0..0..1....0..0..0..0....0..1..1..1....1..0..1..0....0..1..1..0
..1..0..0..1....1..1..1..0....0..1..1..1....0..0..1..0....1..0..0..1

Crossrefs

Cf. A237738.

Sequence in context: A207532 A167587 A182387 * A252517 A263010 A351670

Adjacent sequences: A237732 A237733 A237734 * A237736 A237737 A237738

Keyword

nonn

Author

R. H. Hardin, Feb 12 2014

Status

approved