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!)
A222489 Number of 2Xn 0..2 arrays with exactly floor(2Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order 1

%I #4 Feb 22 2013 08:02:54

%S 0,0,4,5,14,100,152,998,2168,10768,25816,125264,303568,1457312,

%T 3658176,16964356,44394392,199079568,539372480,2352788576,6567620800,

%U 27950582336,80148609344,333551963152,979715239584,3996802471680,11991536245888

%N Number of 2Xn 0..2 arrays with exactly floor(2Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order

%C Row 2 of A222488

%H R. H. Hardin, <a href="/A222489/b222489.txt">Table of n, a(n) for n = 1..65</a>

%e All solutions for n=4

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

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

%K nonn

%O 1,3

%A _R. H. Hardin_ Feb 22 2013

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 March 29 11:14 EDT 2024. Contains 371278 sequences. (Running on oeis4.)