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A237369 Number of (n+1)X(2+1) 0..2 arrays with the maximum plus the upper median plus the lower median plus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1
288, 1164, 4760, 20812, 90528, 393456, 1707488, 7460608, 32509760, 141269808, 613267808, 2679432304, 11675906432, 50736815168, 220255387008, 962317756288, 4193401642752, 18222123217856, 79104715510144, 345616379670720 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A237375

LINKS

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

FORMULA

Empirical: a(n) = 370*a(n-4) -3916*a(n-8) +6904*a(n-12) -1984*a(n-16) for n>18

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A250788 A179646 A281236 * A280936 A250871 A128392

Adjacent sequences:  A237366 A237367 A237368 * A237370 A237371 A237372

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 07 2014

STATUS

approved

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Last modified May 19 22:32 EDT 2019. Contains 323411 sequences. (Running on oeis4.)