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A237679 Number of (n+1)X(2+1) 0..2 arrays colored with the upper median plus the lower median minus the minimum of every 2X2 subblock 1
474, 4146, 35620, 308814, 2688928, 23395998, 203035400, 1763640726, 15330212940, 133229902148, 1157405405328, 10056256933700, 87386040556298, 759320263256056, 6597525952465324, 57325883121376908, 498115222768298578 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A237683

LINKS

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

R. H. Hardin, Empirical recurrence of order 67

FORMULA

Empirical recurrence of order 67 (see link above)

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A215738 A045302 A187612 * A236776 A236636 A104649

Adjacent sequences:  A237676 A237677 A237678 * A237680 A237681 A237682

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 11 2014

STATUS

approved

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Last modified October 27 09:08 EDT 2020. Contains 338035 sequences. (Running on oeis4.)