A237379 Number of (n+1)X(3+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.

1472, 12408, 104248, 912912, 7660840, 64312576, 541081120, 4737777088, 39760171616, 333806884096, 2808515986304, 24588279099648, 206361136896640, 1732616605809664, 14578042664665600, 127611392718380032

Offset

1,1

Comments

Column 3 of A237384

Links

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

Formula

Empirical: a(n) = 10380*a(n-4) -26935616*a(n-8) for n>11

Example

Some solutions for n=3
..0..1..0..1....1..0..2..0....0..0..2..1....1..0..2..2....0..1..0..1
..1..1..2..0....0..1..0..2....0..1..1..1....2..2..2..1....1..2..0..1
..0..2..0..2....0..0..1..2....1..2..1..1....1..1..2..1....2..0..2..2
..2..1..1..2....2..2..2..1....0..2..1..2....2..1..0..2....1..1..2..0

Crossrefs

Sequence in context: A068753 A255735 A252521 * A237144 A187310 A167575

Adjacent sequences: A237376 A237377 A237378 * A237380 A237381 A237382

Keyword

nonn

Author

R. H. Hardin, Feb 07 2014

Status

approved