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A120790 Number of monocyclic skeletons with n carbon atoms and a ring size of 7. 3
1, 1, 5, 13, 47, 136, 428, 1252, 3716, 10708, 30823, 87504, 247438, 694588, 1942866, 5411640, 15034045, 41659417, 115231598, 318231047, 877817312, 2419033683, 6661335192, 18332784221, 50432439047, 138692804603, 381332833730, 1048322091176, 2881742370070 (list; graph; refs; listen; history; text; internal format)
OFFSET

7,3

REFERENCES

Camden A. Parks and James B. Hendrickson, Enumeration of monocyclic and bicyclic carbon skeletons, J. Chem. Inf. Comput. Sci., vol. 31, 334-339 (1991).

LINKS

Andrew Howroyd, Table of n, a(n) for n = 7..200

CROSSREFS

Column k=7 of A305059.

Sequence in context: A194639 A152925 A304964 * A162563 A250133 A025545

Adjacent sequences:  A120787 A120788 A120789 * A120791 A120792 A120793

KEYWORD

nonn

AUTHOR

Parthasarathy Nambi, Aug 13 2006

EXTENSIONS

More terms from N. J. A. Sloane, Aug 27 2006

Terms a(26) and beyond from Andrew Howroyd, May 24 2018

STATUS

approved

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Last modified July 21 21:14 EDT 2019. Contains 325199 sequences. (Running on oeis4.)