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!)
A220581 Equals one maps: number of 3Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and antidiagonal neighbors in a random 0..1 3Xn array 1

%I

%S 1,32,91,1441,8334,64497,436288,3036588,21023792,146254012,1011489196,

%T 7016643627,48603225482,336693889957,2332461879768,16156948253940,

%U 111913294295697,775187951935208,5369332881497134,37190288381188178

%N Equals one maps: number of 3Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and antidiagonal neighbors in a random 0..1 3Xn array

%C Row 3 of A220579

%H R. H. Hardin, <a href="/A220581/b220581.txt">Table of n, a(n) for n = 1..27</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Dec 16 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 January 30 22:45 EST 2023. Contains 359947 sequences. (Running on oeis4.)