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Search: id:A121684
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| A121684 |
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Union of {8, 9, 18}, S, 2S and 4S, where S = odd squarefree numbers (A056911). |
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4
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| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 26, 28, 29, 30, 31, 33, 34, 35, 37, 38, 39, 41, 42, 43, 44, 46, 47, 51, 52, 53, 55, 57, 58, 59, 60, 61, 62, 65, 66, 67, 68, 69, 70, 71, 73, 74, 76, 77, 78, 79, 82, 83, 84, 85, 86, 87, 89, 91, 92, 93, 94, 95, 97
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Numbers n such that the cyclic group Z_n is a CI-group.
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REFERENCES
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B. Alspach and M. Mishna, Enumeration of Cayley graphs and digraphs, Discr. Math., 256 (2002), 527-539.
M. Muzychuk, On Adam's conjecture for circulant graphs, Discr. Math. 167 (1997), 497-510.
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LINKS
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M. Mishna, Home Page
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CROSSREFS
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Cf. A121176, A078779.
Sequence in context: A028261 A119675 A037144 this_sequence A123093 A044920 A022766
Adjacent sequences: A121681 A121682 A121683 this_sequence A121685 A121686 A121687
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Sep 13 2006
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