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!)
A203538 Number of nX4 0..2 arrays with every element neighboring horizontally or vertically both a 0 and a 1 1

%I

%S 0,16,144,3364,30976,614656,8479744,129504400,1978826256,29961532836,

%T 454089995044,6895434839056,104626058201344,1587468792674704,

%U 24091008317030656,365573436678862864,5547427717263648804

%N Number of nX4 0..2 arrays with every element neighboring horizontally or vertically both a 0 and a 1

%C Column 4 of A203542

%H R. H. Hardin, <a href="/A203538/b203538.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

%e ..0..0..0..1....2..0..0..1....1..0..0..1....2..1..0..2....2..1..0..1

%e ..1..1..0..1....1..1..0..1....1..0..2..1....0..1..0..1....0..1..0..1

%e ..0..0..2..2....0..1..2..1....1..2..0..0....0..2..1..1....0..0..2..2

%e ..0..0..1..0....0..0..2..0....0..2..1..0....1..0..1..0....1..0..1..0

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Jan 02 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 May 28 18:24 EDT 2022. Contains 354122 sequences. (Running on oeis4.)