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!)
A221197 Number of nX4 arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no occupancy greater than 2 1

%I

%S 4,196,9025,427716,20277009,961434049,45583531009,2161117565476,

%T 102456463038084,4857310924636921,230276948274214416,

%U 10917021188851445889,517556134069075087921,24536386370101531606209

%N Number of nX4 arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no occupancy greater than 2

%C Column 4 of A221200

%H R. H. Hardin, <a href="/A221197/b221197.txt">Table of n, a(n) for n = 1..25</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 04 2013

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 22 05:36 EDT 2021. Contains 348160 sequences. (Running on oeis4.)