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A236698 Number of (n+1)X(1+1) 0..2 arrays colored with the maximum plus the lower median minus the upper median of every 2X2 subblock 1
81, 426, 2285, 12076, 64277, 340944, 1814328, 9631020, 51194672, 271870052, 1444934368, 7675375072, 40784882096, 216663323008, 1151214951968, 6116060404960, 32495699325440, 172643724320704, 917267767532288 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A236704

LINKS

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

FORMULA

Empirical: a(n) = 8*a(n-3) +352*a(n-4) +916*a(n-5) +3728*a(n-6) +10464*a(n-7) +16592*a(n-8) +26464*a(n-9) +20624*a(n-10) +6240*a(n-11) +2048*a(n-12) -5632*a(n-13)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A236610 A236704 A236604 * A235421 A236282 A235417

Adjacent sequences:  A236695 A236696 A236697 * A236699 A236700 A236701

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 30 2014

STATUS

approved

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Last modified January 29 10:34 EST 2020. Contains 331337 sequences. (Running on oeis4.)