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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
 1, 5, 37, 355, 3595, 41962, 486633, 5896400, 75009913, 947911584, 12153660815, 161974729738 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Column 7 of A208814. LINKS EXAMPLE Some solutions for n=6: .-6...-5...-6...-4...-7...-4...-4...-5...-6...-4...-4...-3...-6...-3...-4...-4 .-1....4....0....5....4...-1....1....0....4...-4...-3...-3....4....2....1....0 ..4...-4....5...-3....6....4...-1....7....2....5...-1...-1....0....2....1....2 ..2....4...-5....5....1....0....1...-3....4....6....3....3....3....0....2...-1 .-4....0....2...-3...-2....0....4...-2...-4...-4....3...-3...-1...-1...-2....3 ..5....1....4....0...-2....1...-1....3....0....1....2....7....0....0....2....0 CROSSREFS Sequence in context: A197713 A004208 A198077 * A112698 A234953 A025168 Adjacent sequences:  A208810 A208811 A208812 * A208814 A208815 A208816 KEYWORD nonn AUTHOR R. H. Hardin, Mar 01 2012 STATUS approved

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Last modified January 16 21:37 EST 2019. Contains 319206 sequences. (Running on oeis4.)