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A236780 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays colored with the maximum plus the upper median plus the minimum minus the lower median of every 2X2 subblock 6
81, 474, 474, 2797, 4170, 2797, 16360, 36260, 36260, 16360, 95961, 315666, 471689, 315666, 95961, 562284, 2750070, 6140316, 6140316, 2750070, 562284, 3296708, 24023328, 80610053, 121728522, 80610053, 24023328, 3296708, 19317952 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

........81.........474.........2797........16360.........95961........562284

.......474........4170........36260.......315666.......2750070......24023328

......2797.......36260.......471689......6140316......80610053....1058879504

.....16360......315666......6140316....121728522....2437062052...49038860968

.....95961.....2750070.....80610053...2437062052...75317723364.2336323498652

....562284....24023328...1058879504..49038860968.2336323498652

...3296708...209304200..13857495596.976380249206

..19317952..1823484380.181102978376

.113216324.15890176976

.663531280

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..60

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 17]

k=2: [order 62]

EXAMPLE

Some solutions for n=2 k=4

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

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

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

CROSSREFS

Sequence in context: A253517 A237683 A236640 * A237678 A236635 A236775

Adjacent sequences:  A236777 A236778 A236779 * A236781 A236782 A236783

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jan 31 2014

STATUS

approved

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Last modified November 27 04:07 EST 2020. Contains 338677 sequences. (Running on oeis4.)