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A237368 Number of (n+1)X(1+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
81, 288, 1024, 3840, 14400, 53760, 200704, 752640, 2822400, 10536960, 39337984, 147517440, 553190400, 2065244160, 7710244864, 28913418240, 108425318400, 404787855360, 1511207993344, 5667029975040, 21251362406400, 79338419650560 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A237375

LINKS

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

FORMULA

Empirical: a(n) = 196*a(n-4) for n>6

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A236875 A236868 A237375 * A017078 A236055 A236048

Adjacent sequences:  A237365 A237366 A237367 * A237369 A237370 A237371

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 07 2014

STATUS

approved

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Last modified April 23 09:35 EDT 2019. Contains 322385 sequences. (Running on oeis4.)