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A236819 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the maximum plus the lower median minus the minimum of every 2X2 subblock equal 9
81, 303, 303, 1162, 1791, 1162, 4627, 10702, 10702, 4627, 18527, 66853, 98380, 66853, 18527, 75330, 419301, 956456, 956456, 419301, 75330, 307321, 2680296, 9360398, 14757359, 9360398, 2680296, 307321, 1264403, 17221539, 93804194, 230126265 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.......81........303..........1162............4627.............18527

......303.......1791.........10702...........66853............419301

.....1162......10702.........98380..........956456...........9360398

.....4627......66853........956456........14757359.........230126265

....18527.....419301.......9360398.......230126265........5737086630

....75330....2680296......93804194......3697318630......148094642882

...307321...17221539.....947327860.....60011383119.....3864575378035

..1264403..111813697....9682975968....987175371637...102225528160171

..5216986..729282012...99543701888..16341810901082..2719153814334744

.21640527.4786748055.1030061727604.272220635630305.72722922283523296

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..144

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 15]

k=2: [order 34]

k=3: [order 87]

EXAMPLE

Some solutions for n=3 k=4

..0..0..0..0..0....0..0..2..0..2....0..0..0..0..0....0..0..0..2..0

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

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

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

CROSSREFS

Sequence in context: A237802 A237779 A237772 * A237099 A236812 A237092

Adjacent sequences: A236816 A236817 A236818 * A236820 A236821 A236822

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jan 31 2014

STATUS

approved

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Last modified February 2 12:48 EST 2023. Contains 360021 sequences. (Running on oeis4.)