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A236050 Number of (n+1)X(3+1) 0..2 arrays colored with the difference of the maximum and minimum in each 2X2 subblock 1
1112, 3516, 12686, 32608, 103986, 297316, 981554, 2710176, 8760338, 24641412, 80155474, 224030592, 726570374, 2036634156, 6612233002, 18513979560, 60080465798, 168303117636, 546265954102, 1529959079880, 4965452373566 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A236055

LINKS

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

FORMULA

Empirical: a(n) = 5*a(n-2) +42*a(n-4) -21*a(n-6) -207*a(n-8) for n>13

EXAMPLE

Some solutions for n=4

..2..0..0..2....1..2..1..0....2..0..0..2....2..2..0..0....2..2..0..1

..0..1..1..2....0..1..1..2....0..1..1..1....2..1..1..0....1..2..1..0

..0..1..1..2....1..1..1..2....1..1..1..0....1..0..1..2....0..1..1..2

..2..1..0..0....1..1..0..0....1..1..2..1....1..1..2..2....0..1..1..2

..1..2..0..1....1..2..0..0....1..0..1..2....0..2..1..0....2..0..0..0

CROSSREFS

Sequence in context: A274831 A154805 A203897 * A213979 A225351 A066484

Adjacent sequences:  A236047 A236048 A236049 * A236051 A236052 A236053

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 18 2014

STATUS

approved

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Last modified May 24 21:08 EDT 2022. Contains 354043 sequences. (Running on oeis4.)