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!)
A199708 Number of -n..n arrays x(0..5) of 6 elements with zero sum and no two neighbors equal 3

%I #10 Dec 30 2012 01:50:37

%S 32,708,4964,20116,59992,147072,314532,608420,1089752,1836600,2946204,

%T 4537152,6751384,9756388,13747296,18948952,25618064,34045344,44557532,

%U 57519592,73336788,92456792,115371796,142620672,174790996,212521224

%N Number of -n..n arrays x(0..5) of 6 elements with zero sum and no two neighbors equal

%C Row 6 of A199704

%H R. H. Hardin, <a href="/A199708/b199708.txt">Table of n, a(n) for n = 1..200</a>

%F Empirical: a(n)=3*a(n-1)-2*a(n-2)-a(n-3)+2*a(n-5)-a(n-6)-a(n-7)+2*a(n-8)-a(n-10)-2*a(n-11)+3*a(n-12)-a(n-13)

%e Some solutions for n=5

%e ..5....0....0....1....1....2...-2....5....0....2...-1...-1....0....0...-5...-4

%e ..0...-3....1...-5...-1...-2....5....1...-5....1....1....2....4....4....5...-1

%e .-1....5....3....4....1....4...-1...-4....1....2...-2...-5....0....1...-3....1

%e .-5....2...-1....2....3...-1....1...-2....5...-5....5....5...-1...-3....1....2

%e ..0...-1....1...-2...-4...-3...-4...-4...-3...-4....0....0....2...-4....4....3

%e ..1...-3...-4....0....0....0....1....4....2....4...-3...-1...-5....2...-2...-1

%K nonn

%O 1,1

%A _R. H. Hardin_ Nov 09 2011

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 April 23 19:56 EDT 2024. Contains 371916 sequences. (Running on oeis4.)