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A208813 Number of n-bead necklaces labeled with numbers -7..7 not allowing reversal, with sum zero and three times sum of squares <= n*(7)*(7+1). 0

%I #6 Mar 12 2017 23:14:31

%S 1,5,37,355,3595,41962,486633,5896400,75009913,947911584,12153660815,

%T 161974729738

%N Number of n-bead necklaces labeled with numbers -7..7 not allowing reversal, with sum zero and three times sum of squares <= n*(7)*(7+1).

%C Column 7 of A208814.

%e Some solutions for n=6:

%e .-6...-5...-6...-4...-7...-4...-4...-5...-6...-4...-4...-3...-6...-3...-4...-4

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

%e ..4...-4....5...-3....6....4...-1....7....2....5...-1...-1....0....2....1....2

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

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

%e ..5....1....4....0...-2....1...-1....3....0....1....2....7....0....0....2....0

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 01 2012

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Last modified March 28 10:31 EDT 2024. Contains 371240 sequences. (Running on oeis4.)