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!)
A145997 Number of n X n binary arrays with all ones connected only in a 3X3 plus 2,1 2,2 2,3 1,2 3,2. 0

%I

%S 1,1,2,5,12,51,317,2654,30351,489559,11104536,350752586,15493779226,

%T 954798521885,82299096564021,9909284745619443,1667319814728326908,

%U 391914922807260266420,128722643370894309970881

%N Number of n X n binary arrays with all ones connected only in a 3X3 plus 2,1 2,2 2,3 1,2 3,2.

%e Maximal 8 X 8 example

%e .0.0.0.0.1.0.0.0

%e .0.1.0.1.1.1.0.0

%e .1.1.1.0.1.0.1.0

%e .0.1.0.1.0.1.1.1

%e .0.0.1.1.1.0.1.0

%e .0.1.0.1.0.1.0.0

%e .1.1.1.0.1.1.1.0

%e .0.1.0.0.0.1.0.0

%K nonn

%O 1,3

%A _R. H. Hardin_, Oct 26 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 May 6 08:22 EDT 2021. Contains 343580 sequences. (Running on oeis4.)