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A112410 Number of simple graphs with n vertices and two cycles. 7
0, 0, 0, 1, 5, 17, 56, 182, 573, 1792, 5533, 16977, 51652, 156291, 470069, 1407264, 4193977, 12451760, 36838994, 102733261 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

REFERENCES

J. B. Hendrickson and C. A. Parks, "Generation and Enumeration of Carbon skeletons", J. Chem. Inf. Comput. Sci, vol. 31 (1991) pp. 101-107. See Table 2, column 4 on page 103.

LINKS

Table of n, a(n) for n=0..19.

Michael A. Kappler, GENSMI: Exhaustive Enumeration of Simple Graphs.

CROSSREFS

A036671 is the equivalent with one cycle.

Sequence in context: A081495 A191645 A146240 * A146271 A145371 A112044

Adjacent sequences:  A112407 A112408 A112409 * A112411 A112412 A112413

KEYWORD

nonn

AUTHOR

Jonathan Vos Post, Dec 08 2005

STATUS

approved

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Last modified April 29 01:04 EDT 2017. Contains 285604 sequences.