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A236451 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays colored with the difference of the maximum and minimum in each 2X2 subblock 7
256, 2116, 2116, 17258, 25172, 17258, 136208, 280436, 280436, 136208, 1080984, 3081484, 4535608, 3081484, 1080984, 8564392, 33804644, 66621676, 66621676, 33804644, 8564392, 67897642, 372302304, 1010208094, 1449135596, 1010208094 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

........256.........2116..........17258...........136208.............1080984

.......2116........25172.........280436..........3081484............33804644

......17258.......280436........4535608.........66621676..........1010208094

.....136208......3081484.......66621676.......1449135596.........33053505704

....1080984.....33804644.....1010208094......33053505704.......1166414287888

....8564392....372302304....15722137048.....776197082280......41279981011320

...67897642...4107125100...247623908622...18067929385444....1477275293586586

..538065184..45253160716..3790739028840..417098720716876...52628266318084400

.4265291002.498239745892.58545992300474.9663226837691844.1890840513888912176

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..97

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 11] for n>13

k=2: [order 34] for n>37

EXAMPLE

Some solutions for n=2 k=4

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

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

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

CROSSREFS

Sequence in context: A237333 A221487 A014711 * A236445 A205954 A205466

Adjacent sequences:  A236448 A236449 A236450 * A236452 A236453 A236454

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jan 26 2014

STATUS

approved

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Last modified August 3 01:52 EDT 2021. Contains 346429 sequences. (Running on oeis4.)