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!)
A238155 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 8
256, 1608, 1608, 10664, 15800, 10664, 72584, 165780, 165780, 72584, 499560, 1792226, 2842692, 1792226, 499560, 3342416, 18918620, 51036456, 51036456, 18918620, 3342416, 22488016, 202875630, 961463420, 1809464182, 961463420 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.......256........1608.........10664............72584..............499560

......1608.......15800........165780..........1792226............18918620

.....10664......165780.......2842692.........51036456...........961463420

.....72584.....1792226......51036456.......1809464182.........63323756608

....499560....18918620.....961463420......63323756608.......4251191656884

...3342416...202875630...18066348584....2281444628340.....277864575306608

..22488016..2177434900..345494546192...79094196555400...18866641119536914

.152285824.23302931502.6395305423256.2844505175089988.1284534193930221572

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..112

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 20] for n>21

k=2: [order 56] for n>58

EXAMPLE

Some solutions for n=2 k=4

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

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

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

CROSSREFS

Sequence in context: A238074 A251974 A250429 * A238148 A237927 A237922

Adjacent sequences:  A238152 A238153 A238154 * A238156 A238157 A238158

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Feb 18 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 February 24 14:56 EST 2020. Contains 332209 sequences. (Running on oeis4.)