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A236610 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays colored with the maximum plus the lower median minus the minimum of every 2X2 subblock 7
81, 426, 426, 2269, 3056, 2269, 12004, 21814, 21814, 12004, 63945, 157852, 216432, 157852, 63945, 339684, 1148940, 2192662, 2192662, 1148940, 339684, 1806104, 8334390, 22613889, 32232284, 22613889, 8334390, 1806104, 9590924, 60321850 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

........81.........426..........2269..........12004...........63945

.......426........3056.........21814.........157852.........1148940

......2269.......21814........216432........2192662........22613889

.....12004......157852.......2192662.......32232284.......482194440

.....63945.....1148940......22613889......482194440.....10662271681

....339684.....8334390.....229977940.....7140442816....231503851600

...1806104....60321850....2342679410...105098040870...5012901082760

...9590924...437145312...23816075424..1555308108966.108685943861624

..50981860..3170639968..243763361660.23066776469364

.270885808.22986654954.2479046935412

LINKS

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

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 17]

k=2: [order 42]

EXAMPLE

Some solutions for n=2 k=4

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

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

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

CROSSREFS

Sequence in context: A206661 A238173 A206407 * A236704 A236604 A236698

Adjacent sequences:  A236607 A236608 A236609 * A236611 A236612 A236613

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jan 29 2014

STATUS

approved

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Last modified August 17 17:59 EDT 2022. Contains 356189 sequences. (Running on oeis4.)