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Number of n-bead necklaces labeled with numbers -6..6 not allowing reversal, with sum zero and three times sum of squares <= n*(6)*(6+1).
0

%I #6 Mar 12 2017 23:14:03

%S 1,4,29,236,2095,20409,209793,2220143,23933783,264637987,2967244283,

%T 33695174581,387241027611

%N Number of n-bead necklaces labeled with numbers -6..6 not allowing reversal, with sum zero and three times sum of squares <= n*(6)*(6+1).

%C Column 6 of A208814:

%e Some solutions for n=6:

%e .-3...-2...-5...-4...-4...-5...-4...-4...-6...-5...-6...-4...-5...-4...-5...-5

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

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

%e .-2...-2....0....5...-3....0....1...-1...-3...-4....6....3....4...-3....6...-4

%e ..6...-2....0...-1...-1....2....4....1....5....1....1....4...-3....4....0...-1

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

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 01 2012