A235787 Number of (4+1) X (n+1) 0..2 arrays with the difference of the upper and lower median value of each 2 X 2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise.

17837, 924323, 41559689, 1647458581, 60893670493, 2094824462739, 68611567225003, 2143539826346751, 64564856564377493, 1881089804262142705, 53326114376091385649, 1475596467988352153487, 40006226305036094218101

Offset

1,1

Comments

Row 4 of A235784.

Links

R. H. Hardin, Table of n, a(n) for n = 1..143

Example

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

Crossrefs

Cf. A235784.

Sequence in context: A054472 A204742 A235782 * A235563 A188103 A250078

Adjacent sequences: A235784 A235785 A235786 * A235788 A235789 A235790

Keyword

nonn

Author

R. H. Hardin, Jan 15 2014

Status

approved