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A236710 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays colored with the maximum plus the upper median minus the lower median of every 2X2 subblock 6
81, 442, 442, 2464, 3492, 2464, 13720, 27406, 27406, 13720, 76404, 216340, 313360, 216340, 76404, 424600, 1707838, 3607280, 3607280, 1707838, 424600, 2361716, 13499232, 42032622, 62377580, 42032622, 13499232, 2361716, 13136192, 106577620 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

........81.........442..........2464...........13720...........76404

.......442........3492.........27406..........216340.........1707838

......2464.......27406........313360.........3607280........42032622

.....13720......216340.......3607280........62377580......1099360056

.....76404.....1707838......42032622......1099360056.....29705776060

....424600....13499232.....489450096.....19356846358....800348545256

...2361716...106577620....5684197999....338611786558..21427121287833

..13136192...841345444...65906387212...5938320805688.575347045288652

..73071732..6643410412..766873371754.104483857316574

.406402784.52475002544.8913443952908

LINKS

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

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 19]

k=2: [order 59] for n>60

EXAMPLE

Some solutions for n=2 k=4

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

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

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

CROSSREFS

Sequence in context: A017630 A270538 A230064 * A236705 A253749 A253375

Adjacent sequences:  A236707 A236708 A236709 * A236711 A236712 A236713

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jan 30 2014

STATUS

approved

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Last modified July 24 11:51 EDT 2021. Contains 346273 sequences. (Running on oeis4.)