login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A209341 Number of n-bead necklaces labeled with numbers -5..5 allowing reversal, with sum zero with no three beads in a row equal. 0

%I

%S 1,6,17,128,883,7358,62853,563109,5153746,48127107,456011561,

%T 4374662802,42398844001

%N Number of n-bead necklaces labeled with numbers -5..5 allowing reversal, with sum zero with no three beads in a row equal.

%C Column 5 of A209344.

%e Some solutions for n=7:

%e .-4...-5...-5...-5...-3...-3...-5...-4...-3...-5...-3...-4...-4...-5...-4...-3

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

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

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 06 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 October 20 22:22 EDT 2021. Contains 348119 sequences. (Running on oeis4.)