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!)
A235849 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the upper median unequal to the lower median in every 2X2 subblock 7
156, 1584, 1584, 16228, 42080, 16228, 166816, 1133608, 1133608, 166816, 1716484, 30740652, 80556656, 30740652, 1716484, 17668128, 835207356, 5778908484, 5778908484, 835207356, 17668128, 181881988, 22709045764, 415698469568 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

......156........1584..........16228............166816..............1716484

.....1584.......42080........1133608..........30740652............835207356

....16228.....1133608.......80556656........5778908484.........415698469568

...166816....30740652.....5778908484.....1099656771452......209981690279512

..1716484...835207356...415698469568...209981690279512...106515130271657924

.17668128.22709045764.29937676955084.40159317967439332.54136683763799147676

LINKS

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

FORMULA

Empirical for column k:

k=1: a(n) = 14*a(n-1) -31*a(n-2) -94*a(n-3) +192*a(n-4) +192*a(n-5)

k=2: [order 15]

k=3: [order 55]

EXAMPLE

Some solutions for n=2 k=4

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

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

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

CROSSREFS

Sequence in context: A232718 A204957 A263305 * A235843 A065699 A263290

Adjacent sequences:  A235846 A235847 A235848 * A235850 A235851 A235852

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jan 16 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 October 29 04:54 EDT 2020. Contains 338066 sequences. (Running on oeis4.)