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 A208534 Number of n-bead necklaces of 7 colors not allowing reversal, with no adjacent beads having the same color 0
 7, 21, 70, 336, 1554, 7826, 39990, 210126, 1119790, 6047412, 32981550, 181402676, 1004668770, 5597460306, 31345666730, 176319474366, 995685849690, 5642220380006, 32071565263710, 182807925027504 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 7 of A208535 LINKS EXAMPLE Some solutions for n=4 ..1....1....2....3....3....1....1....2....1....3....1....3....4....1....1....1 ..3....5....3....5....5....6....3....7....5....7....4....7....7....2....3....5 ..1....7....4....6....3....1....4....4....7....6....3....5....5....4....6....4 ..5....2....3....7....7....6....5....3....6....4....2....4....6....7....2....2 CROSSREFS Sequence in context: A245404 A215494 A146533 * A135576 A153497 A146247 Adjacent sequences:  A208531 A208532 A208533 * A208535 A208536 A208537 KEYWORD nonn AUTHOR R. H. Hardin Feb 27 2012 STATUS approved

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Last modified May 26 02:35 EDT 2019. Contains 323579 sequences. (Running on oeis4.)