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!)
A208374 Number of n X n 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 1 0 1 vertically 1

%I

%S 2,16,72,420,2176,10660,60984,340816,1846240,11076228,66303360,

%T 390426916,2456007216,15586002640,98058552648,645057461220,

%U 4299810563584,28563593727716,195777751059000,1361449965542992,9468978890210480

%N Number of n X n 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 1 0 1 vertically

%C Diagonal of A208379

%H R. H. Hardin, <a href="/A208374/b208374.txt">Table of n, a(n) for n = 1..39</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 25 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 August 10 16:24 EDT 2022. Contains 356039 sequences. (Running on oeis4.)