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A005967
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Number of isomorphism classes of connected 3-regular multigraphs of order 2n, loops allowed.
(Formerly M1512)
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7
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2, 5, 17, 71, 388, 2592, 21096, 204638, 2317172, 30024276, 437469859, 7067109598, 125184509147, 2410455693765, 50101933643655, 1117669367609605
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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REFERENCES
| A. T. Balaban, Enumeration of Cyclic Graphs, pp. 63-105 of A. T. Balaban, ed., Chemical Applications of Graph Theory, Ac. Press, 1976; see p. 92.
Brendan McKay, software at http://cs.anu.edu.au/~bdm/nauty/
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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CROSSREFS
| Cf. A129427, A000421, A085549, A129430, A129432, A129434, A129436
Sequence in context: A005966 A101900 A082282 * A104859 A108289 A007779
Adjacent sequences: A005964 A005965 A005966 * A005968 A005969 A005970
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| Checked by Brendan McKay (bdm(at)cs.anu.edu.au), Apr 15 2007
Using sequence A129427, terms a(12) - a(16) were computed in GAP by Ignat Soroko (ignat.soroko(AT)gmail.com), Apr 07 2010
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