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A126122 Number of edge-rooted unlabeled graphs on n nodes. 2
0, 1, 3, 14, 74, 572, 6564, 125120, 4147832, 247183688, 26814414976, 5327509126272, 1946813194004224, 1313879013920844480, 1644521424392726492800, 3833402238753872010743808, 16708198671847617602943683072, 136682601082422255664288717142080 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

In other words, number of unlabeled graphs on n nodes with a marked edge.

REFERENCES

F. Harary and E. M. Palmer, Graphical Enumeration, Academic Press, NY, 1973.

LINKS

Vladeta Jovovic, Table of n, a(n) for n = 1..40

CROSSREFS

Cf. A000088, A000666.

Sequence in context: A210346 A074549 A245246 * A026004 A200718 A063016

Adjacent sequences:  A126119 A126120 A126121 * A126123 A126124 A126125

KEYWORD

nonn

AUTHOR

Vladeta Jovovic, Mar 07 2007

STATUS

approved

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Last modified December 21 13:45 EST 2014. Contains 252321 sequences.