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A034892 Balanced signed graphs with n nodes. 0
1, 3, 8, 39, 226, 2283, 36789, 1062679, 55717077, 5405078682, 972656526492, 325183692812200 (list; graph; refs; listen; history; internal format)
OFFSET

3,2

REFERENCES

R. C. Read and R. J. Wilson, An Atlas of Graphs, Oxford, 1998.

CROSSREFS

Cf. A005142.

Sequence in context: A065914 A180368 A108262 * A072687 A110561 A107991

Adjacent sequences:  A034889 A034890 A034891 * A034893 A034894 A034895

KEYWORD

nonn,nice

AUTHOR

R. C. Read (rcread(AT)math.uwaterloo.ca)

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Last modified February 17 23:37 EST 2012. Contains 206085 sequences.