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A236047 Number of (n+1)X(n+1) 0..2 arrays colored with the difference of the maximum and minimum in each 2X2 subblock 0
81, 1068, 12686, 92392, 773442, 5604400, 44834198, 289134368, 2222640774, 14296163080, 109103294482, 686921984208, 5195005028738, 32919630237968, 247864648460478, 1570367863370880 (list; graph; refs; listen; history; text; internal format)
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

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Last modified September 25 12:23 EDT 2020. Contains 337343 sequences. (Running on oeis4.)