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A236828 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the maximum plus the minimum minus the lower median of every 2X2 subblock equal 9
81, 327, 327, 1386, 2211, 1386, 6093, 15254, 15254, 6093, 27079, 109205, 168564, 109205, 27079, 121590, 786609, 1949236, 1949236, 786609, 121590, 549173, 5747502, 22695802, 36874967, 22695802, 5747502, 549173, 2495215, 42215123, 269108894 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.......81.........327..........1386.............6093..............27079

......327........2211.........15254...........109205.............786609

.....1386.......15254........168564..........1949236...........22695802

.....6093......109205.......1949236.........36874967..........701424751

....27079......786609......22695802........701424751........21755065689

...121590.....5747502.....269108894......13643698414.......692297987804

...549173....42215123....3207539588.....266389315989.....22074170878628

..2495215...312592339...38599508572....5258599354623....712496076337427

.11389842..2324534826..466275664500..104078580277828..23029391418201045

.52223381.17376767995.5664487537556.2072356525693189.749146158534878661

LINKS

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

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 14]

k=2: [order 30]

k=3: [order 84]

EXAMPLE

Some solutions for n=3 k=4

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

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

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

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

CROSSREFS

Sequence in context: A250443 A017162 A250427 * A236821 A237511 A237504

Adjacent sequences: A236825 A236826 A236827 * A236829 A236830 A236831

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jan 31 2014

STATUS

approved

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Last modified January 28 08:35 EST 2023. Contains 359850 sequences. (Running on oeis4.)