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!)
A145943 Number of n X n binary arrays with all ones connected in a 3X2 elbow 1,1 1,2 1,3 2,3 in any orientation. 0

%I

%S 1,1,17,101,1439,45325,2541179,249765423,48546882545,17503645590565,

%T 11722960747922791

%N Number of n X n binary arrays with all ones connected in a 3X2 elbow 1,1 1,2 1,3 2,3 in any orientation.

%e Maximal 8 X 8 example

%e .1.1.1.0.1.1.1.0

%e .0.0.1.0.1.0.0.1

%e .1.1.0.0.0.1.1.1

%e .1.0.1.1.1.0.0.0

%e .1.0.0.0.1.0.1.1

%e .0.1.1.1.0.1.0.1

%e .1.0.0.1.0.1.0.1

%e .1.1.1.0.0.1.1.0

%K nonn

%O 1,3

%A _R. H. Hardin_, Oct 25 2008

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 18 03:25 EDT 2021. Contains 348065 sequences. (Running on oeis4.)