A238038 Number of (n+1)X(n+1) 0..2 arrays with the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one

81, 1944, 81524, 6698520, 1021660750, 279924727600, 147986688652636, 142416219762742160

Offset

1,1

Comments

Diagonal of A238046

Links

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

Example

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

Crossrefs

Sequence in context: A224312 A224376 A237957 * A236088 A253448 A205978

Adjacent sequences: A238035 A238036 A238037 * A238039 A238040 A238041

Keyword

nonn

Author

R. H. Hardin, Feb 17 2014

Status

approved