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A048179
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Number of graphs with n nodes and n+1 edges.
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3
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1, 6, 24, 97, 402, 1637, 6759, 28259, 119890, 517121, 2271860, 10176660, 46541024, 217511951, 1039651295, 5084972068, 25458149446, 130480742790, 684550272269, 3675258986639
(list; graph; refs; listen; history; internal format)
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OFFSET
| 4,2
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REFERENCES
| J. Riordan, An Introduction to Combinatorial Analysis, Wiley, 1958, p. 146.
M. L. Stein and P. R. Stein, Enumeration of Linear Graphs and Connected Linear Graphs up to p = 18 Points. Report LA-3775, Los Alamos Scientific Laboratory of the University of California, Los Alamos, NM, Oct 1967J. Riordan, An Introduction to Combinatorial Analysis, Wiley, 1958, p . 146
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CROSSREFS
| Cf. A008406.
Sequence in context: A164908 A002023 A037505 * A117614 A037688 A126393
Adjacent sequences: A048176 A048177 A048178 * A048180 A048181 A048182
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KEYWORD
| nonn,easy,nice
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Jan 07 2000
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