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A048179 Number of graphs with n nodes and n+1 edges. 4
1, 6, 24, 97, 402, 1637, 6759, 28259, 119890, 517121, 2271860, 10176660, 46541024, 217511951, 1039651295, 5084972068, 25458149446, 130480742790, 684550272269, 3675258986639, 20184618368312, 113340974676578, 650343587802644 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,2

REFERENCES

J. Riordan, An Introduction to Combinatorial Analysis, Wiley, 1958, p. 146.

LINKS

Sean A. Irvine, Table of n, a(n) for n = 4..37

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 1967

CROSSREFS

Cf. A008406.

Sequence in context: A002023 A290911 A037505 * A117614 A037688 A255471

Adjacent sequences:  A048176 A048177 A048178 * A048180 A048181 A048182

KEYWORD

nonn,easy,nice

AUTHOR

N. J. A. Sloane

EXTENSIONS

More terms from Vladeta Jovovic, Jan 07 2000

More terms from Sean A. Irvine, Jun 06 2017

STATUS

approved

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Last modified November 18 11:26 EST 2018. Contains 317302 sequences. (Running on oeis4.)