login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A237391 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays colored with the maximum plus the upper median minus the minimum of every 2X2 subblock 7
81, 434, 434, 2336, 3240, 2336, 12624, 24340, 24340, 12624, 68064, 183764, 255937, 183764, 68064, 366568, 1379886, 2712486, 2712486, 1379886, 366568, 1976940, 10406596, 28732972, 41204198, 28732972, 10406596, 1976940, 10657560, 78612538 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

........81.........434..........2336..........12624...........68064

.......434........3240.........24340.........183764.........1379886

......2336.......24340........255937........2712486........28732972

.....12624......183764.......2712486.......41204198.......629612266

.....68064.....1379886......28732972......629612266.....14010191373

....366568....10406596.....306543648.....9678405410....312459028946

...1976940....78612538....3277420369...148794944054...6958669132771

..10657560...593121116...34947393232..2283761004002.154932883163426

..57441532..4469323758..371861162189.34983096932494

.309578264.33698637958.3961014934240

LINKS

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

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 20]

k=2: [order 58] for n>59

EXAMPLE

Some solutions for n=2 k=4

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

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

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

CROSSREFS

Sequence in context: A235421 A236282 A235417 * A237385 A237308 A237301

Adjacent sequences:  A237388 A237389 A237390 * A237392 A237393 A237394

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Feb 07 2014

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 28 09:52 EST 2020. Contains 331319 sequences. (Running on oeis4.)