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A236041 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays colored with the difference of the upper median and the lower median in each 2X2 subblock 5
256, 2404, 2404, 22994, 42264, 22994, 218568, 722548, 722548, 218568, 2089160, 12435076, 21941716, 12435076, 2089160, 19942272, 215833320, 674450852, 674450852, 215833320, 19942272, 190367530, 3742165712, 21249328546 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

........256........2404........22994........218568.......2089160

.......2404.......42264.......722548......12435076.....215833320

......22994......722548.....21941716.....674450852...21249328546

.....218568....12435076....674450852...38512116748.2269448820024

....2089160...215833320..21249328546.2269448820024

...19942272..3742165712.666177945884

..190367530.64753334132

.1816294128

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..40

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 17]

k=2: [order 87]

EXAMPLE

Some solutions for n=2 k=4

..0..0..2..0..1....0..0..2..2..1....0..0..1..1..3....0..0..3..3..0

..0..1..3..0..1....0..1..2..0..0....0..1..0..2..3....0..0..3..1..0

..2..0..3..2..1....2..3..2..0..1....0..1..3..3..3....2..2..3..1..2

CROSSREFS

Sequence in context: A204303 A236083 A016780 * A236037 A251120 A251114

Adjacent sequences:  A236038 A236039 A236040 * A236042 A236043 A236044

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jan 18 2014

STATUS

approved

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Last modified December 9 04:45 EST 2021. Contains 349626 sequences. (Running on oeis4.)