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A236646 Number of (n+1)X(1+1) 0..2 arrays colored with the maximum plus the upper median minus the lower median minus the minimum of every 2X2 subblock 1
81, 484, 2932, 17824, 108272, 655100, 3970468, 24093844, 146112996, 885471428, 5368434004, 32556604804, 197396153396, 1196688738212, 7255631320212, 43993941478852, 266737613009204, 1617205521101540, 9805281128974548 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A236651

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +4*a(n-2) +60*a(n-3) +500*a(n-4) +608*a(n-5) +1064*a(n-6) +512*a(n-7) -14672*a(n-8) -18640*a(n-9) -27776*a(n-10) -53248*a(n-11)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A295018 A250613 A237077 * A205246 A205239 A236427

Adjacent sequences:  A236643 A236644 A236645 * A236647 A236648 A236649

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 29 2014

STATUS

approved

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Last modified August 9 05:53 EDT 2022. Contains 356016 sequences. (Running on oeis4.)