The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A183812 1/81 the number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor 0

%I #5 Mar 31 2012 12:35:54

%S 1,162,163208,1042063656,41531687999736,10425296660739253420

%N 1/81 the number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor

%C Diagonal of A183819

%e Some solutions with upper left block zero for 3X3

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Jan 07 2011

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 May 24 16:28 EDT 2024. Contains 372779 sequences. (Running on oeis4.)