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!)
A220374 Equals two maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and vertical neighbors in a random 0..2 nX4 array 0

%I

%S 4,94,2095,39780,722126,12480964,209958887,3466406061

%N Equals two maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and vertical neighbors in a random 0..2 nX4 array

%C Column 4 of A220375

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 13 2012

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 January 24 22:45 EST 2022. Contains 350565 sequences. (Running on oeis4.)