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A054499
Number of pairings on a bracelet; number of chord diagrams that can be turned over and having n chords.
+0
9
1, 2, 5, 17, 79, 554, 5283, 65346, 966156, 16411700, 312700297, 6589356711, 152041845075, 3811786161002, 103171594789775, 2998419746654530, 93127358763431113, 3078376375601255821, 107905191542909828013, 3997887336845307589431
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Maintained by
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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.
AT&T Labs Research
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