A237736 Number of (n+2)X(3+2) 0..1 arrays with the (lower) median of each row and column nondecreasing

3720, 105639, 1659924, 38387146, 639694176, 13279334007, 226316321580, 4405469041518, 75639307776048, 1412509368887850, 24269633489414040, 440509206404382732, 7551731737591713408, 134301252331626465687

Offset

1,1

Comments

Column 3 of A237738

Links

R. H. Hardin, Table of n, a(n) for n = 1..20

Example

Some solutions for n=2
..0..0..1..0..1....0..0..0..0..0....0..0..0..1..1....0..0..1..0..1
..0..0..1..1..0....0..1..0..0..1....0..0..1..0..0....0..0..1..0..1
..0..0..0..1..0....0..1..0..0..1....0..0..0..0..0....0..0..0..1..0
..0..1..0..0..0....1..0..1..0..1....1..1..1..1..1....1..1..0..1..1

Crossrefs

Sequence in context: A158917 A252421 A296908 * A289512 A260860 A221013

Adjacent sequences: A237733 A237734 A237735 * A237737 A237738 A237739

Keyword

nonn

Author

R. H. Hardin, Feb 12 2014

Status

approved