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A236669 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays colored with the maximum plus the lower median minus the upper median minus the minimum of every 2X2 subblock 6
81, 452, 452, 2608, 3720, 2608, 14760, 30352, 30352, 14760, 84948, 250708, 368090, 250708, 84948, 484400, 2079296, 4434788, 4434788, 2079296, 484400, 2771648, 17174856, 55108806, 82202172, 55108806, 17174856, 2771648, 15802528, 141244420 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

........81.........452...........2608...........14760...........84948

.......452........3720..........30352..........250708.........2079296

......2608.......30352.........368090.........4434788........55108806

.....14760......250708........4434788........82202172......1533811128

.....84948.....2079296.......55108806......1533811128.....44409371442

....484400....17174856......664310024.....28390507456...1243675317240

...2771648...141244420.....8131629834....520848836744..35244374739432

..15802528..1164128912....98186159604...9689359336344.998449131759624

..90361616..9621726624..1210293445866.180751835666464

.516384576.79482813380.14656239076752

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..84

FORMULA

Empirical for column k:

k=1: a(n) = 2*a(n-1) +436*a(n-4) +888*a(n-5) +2304*a(n-6) +5760*a(n-7)

k=2: [order 15]

EXAMPLE

Some solutions for n=2 k=4

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

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

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

CROSSREFS

Sequence in context: A204223 A205215 A206223 * A205208 A236664 A253533

Adjacent sequences:  A236666 A236667 A236668 * A236670 A236671 A236672

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jan 29 2014

STATUS

approved

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Last modified October 18 20:08 EDT 2021. Contains 348069 sequences. (Running on oeis4.)