A238073 Number of (n+1)X(n+1) 0..3 arrays with the maximum plus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one

256, 14456, 1781008, 336372000, 182752988334, 220851136586828, 747061315866664736, 5370193055761518144212

Offset

1,1

Comments

Diagonal of A238081

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Sequence in context: A205089 A239443 A240932 * A017032 A136286 A269204

Adjacent sequences: A238070 A238071 A238072 * A238074 A238075 A238076

Keyword

nonn

Author

R. H. Hardin, Feb 17 2014

Status

approved