login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A237380 Number of (n+1)X(4+1) 0..2 arrays with the maximum plus the minimum minus the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1

%I

%S 6368,76188,912912,11767448,141627680,1709556016,20834106592,

%T 274803913264,3352960252480,40937682523424,504525820605504,

%U 6765320207408288,83335893079026048,1025439716821228992

%N Number of (n+1)X(4+1) 0..2 arrays with the maximum plus the minimum minus the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one

%C Column 4 of A237384

%H R. H. Hardin, <a href="/A237380/b237380.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 68874*a(n-4) -1534369644*a(n-8) +10903411963960*a(n-12) -44879816417664*a(n-16) for n>20

%e Some solutions for n=2

%e ..0..0..0..1..2....2..0..1..2..1....1..0..2..0..0....2..2..1..0..1

%e ..0..0..1..2..2....2..2..2..1..1....0..2..0..1..1....2..0..2..1..1

%e ..0..1..2..2..2....1..0..0..2..0....1..1..0..1..2....1..2..0..2..0

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 07 2014

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 25 07:13 EDT 2022. Contains 354835 sequences. (Running on oeis4.)