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Search: id:A005638
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| A005638 |
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Number of unlabeled trivalent (or cubic) graphs with 2n nodes.
(Formerly M1656)
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+0
5
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| 1, 2, 6, 21, 94, 540, 4207, 42110, 516344, 7373924, 118573592, 2103205738, 40634185402, 847871397424, 18987149095005, 454032821688754, 11544329612485981, 310964453836198311, 8845303172513781271
(list; graph; listen)
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OFFSET
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2,2
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REFERENCES
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Brinkmann, G. "Fast Generation of Cubic Graphs." J. Graph Th. 23, 139-149, 1996.
R. C. Read and R. J. Wilson, An Atlas of Graphs, Oxford, 1998.
Robinson, R. W.; Wormald, N. C.; Numbers of cubic graphs. J. Graph Theory 7 (1983), no. 4, 463-467.
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LINKS
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Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
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CROSSREFS
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Cf. A002851, A000421.
Adjacent sequences: A005635 A005636 A005637 this_sequence A005639 A005640 A005641
Sequence in context: A033540 A115089 A001928 this_sequence A008988 A061232 A020091
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KEYWORD
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nonn,nice
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AUTHOR
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njas
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EXTENSIONS
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More terms from R. C. Read (rcread(AT)math.uwaterloo.ca).
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