A236991 Number of (n+1)X(2+1) 0..2 arrays with the maximum plus the lower median minus the upper median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one

360, 2376, 15552, 104976, 699840, 4618944, 30233088, 204073344, 1360488960, 8979227136, 58773123072, 396718580736, 2644790538240, 17455617552384, 114254951251968, 771220920950784, 5141472806338560, 33933720521834496

Offset

1,1

Comments

Column 2 of A236997

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = 1944*a(n-4)

Example

Some solutions for n=4
..0..1..0....1..0..2....1..1..2....2..0..0....0..2..0....2..1..1....1..2..1
..0..1..1....2..1..0....0..0..0....1..1..0....1..1..0....2..1..2....1..1..0
..0..2..0....1..1..0....1..2..0....1..2..1....0..1..0....0..2..1....2..0..0
..2..0..1....2..0..2....0..1..0....0..1..1....1..2..2....0..0..0....1..0..2
..0..1..0....1..2..2....0..0..1....0..2..0....2..0..0....1..2..2....1..2..1

Crossrefs

Sequence in context: A140801 A236059 A206670 * A205514 A056390 A056380

Adjacent sequences: A236988 A236989 A236990 * A236992 A236993 A236994

Keyword

nonn

Author

R. H. Hardin, Feb 02 2014

Status

approved