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A237325 Number of (n+1)X(1+1) 0..2 arrays with the maximum plus the upper median plus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1
81, 320, 1264, 5120, 20692, 82800, 332192, 1346016, 5439936, 21769152, 87340224, 353899264, 1430292992, 5723670528, 22964038912, 93049464832, 376061938688, 1504905191424, 6037857292288, 24465182810112, 98876703129600 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A237332

LINKS

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

FORMULA

Empirical: a(n) = 288*a(n-4) -6720*a(n-8) +33536*a(n-12) for n>15

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A237567 A237560 A237332 * A158776 A101963 A053171

Adjacent sequences:  A237322 A237323 A237324 * A237326 A237327 A237328

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 06 2014

STATUS

approved

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Last modified June 22 03:25 EDT 2021. Contains 345367 sequences. (Running on oeis4.)