A237380 Number of (n+1)X(4+1) 0..2 arrays with the maximum plus the minimum minus the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one

6368, 76188, 912912, 11767448, 141627680, 1709556016, 20834106592, 274803913264, 3352960252480, 40937682523424, 504525820605504, 6765320207408288, 83335893079026048, 1025439716821228992

Offset

1,1

Comments

Column 4 of A237384

Links

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

Formula

Empirical: a(n) = 68874*a(n-4) -1534369644*a(n-8) +10903411963960*a(n-12) -44879816417664*a(n-16) for n>20

Example

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

Crossrefs

Sequence in context: A292040 A203044 A105009 * A251406 A278187 A206125

Adjacent sequences: A237377 A237378 A237379 * A237381 A237382 A237383

Keyword

nonn

Author

R. H. Hardin, Feb 07 2014

Status

approved