A236047 Number of (n+1)X(n+1) 0..2 arrays colored with the difference of the maximum and minimum in each 2X2 subblock

81, 1068, 12686, 92392, 773442, 5604400, 44834198, 289134368, 2222640774, 14296163080, 109103294482, 686921984208, 5195005028738, 32919630237968, 247864648460478, 1570367863370880

Offset

1,1

Comments

Diagonal of A236055

Links

Table of n, a(n) for n=1..16.

Example

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

Crossrefs

Sequence in context: A237159 A183807 A264203 * A264000 A236781 A237059

Adjacent sequences: A236044 A236045 A236046 * A236048 A236049 A236050

Keyword

nonn

Author

R. H. Hardin, Jan 18 2014

Status

approved