A235836 Number of (4+1)X(n+1) 0..2 arrays with the difference of the upper median and minimum value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise

20537, 1378463, 87276535, 4948377018, 265469754317, 13462405996292, 655276302552671, 30775243815415173, 1403763801656275930, 62473920005481373345, 2723821189454625298291, 116744916159554640181931

Offset

1,1

Comments

Row 4 of A235833

Links

R. H. Hardin, Table of n, a(n) for n = 1..79

Example

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

Crossrefs

Sequence in context: A253539 A178585 A187282 * A235831 A235587 A082254

Adjacent sequences: A235833 A235834 A235835 * A235837 A235838 A235839

Keyword

nonn

Author

R. H. Hardin, Jan 16 2014

Status

approved