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A236058 Number of (n+1)X(1+1) 0..2 arrays colored with the difference of the upper median and the minimum in each 2X2 subblock 1
81, 360, 1616, 7016, 31616, 138988, 620552, 2734804, 12176064, 53818764, 239177944, 1058421796, 4698785664, 20810853180, 92335672184, 409124696372, 1814626300736, 8042404490476, 35664530623384, 158086995532676 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A236065

LINKS

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

FORMULA

Empirical: a(n) = 16*a(n-3) +173*a(n-4) +268*a(n-5) +1216*a(n-6) +1260*a(n-7) +2128*a(n-8) +1296*a(n-9) -3968*a(n-10) -1024*a(n-11) -12288*a(n-12) +256*a(n-13) -6144*a(n-14)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A206676 A205520 A236990 * A205513 A017378 A205736

Adjacent sequences:  A236055 A236056 A236057 * A236059 A236060 A236061

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 18 2014

STATUS

approved

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Last modified August 10 00:32 EDT 2022. Contains 356026 sequences. (Running on oeis4.)