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!)
A206675 Number of (n+1) X 8 0..2 arrays with no 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors or the same number of counterclockwise edge increases as its vertical neighbors. 0

%I #6 Dec 13 2015 21:18:17

%S 750426,6474150,70322310,700650756,8557823793,108434010612,

%T 1530071121621,22248004177848,342778375954590,5376474597787368,

%U 86682713932043619

%N Number of (n+1) X 8 0..2 arrays with no 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors or the same number of counterclockwise edge increases as its vertical neighbors.

%C Column 7 of A206676.

%e Some solutions for n=4:

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 11 2012

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 April 12 19:05 EDT 2024. Contains 371636 sequences. (Running on oeis4.)