

A125672


Classification of bicyclics with the parameter 'alpha' having the value of 3. See the paper by Hendrickson and Parks for details.


1



1, 3, 11, 35, 113, 351, 1093, 3348, 10218, 30906, 93005
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OFFSET

5,2


COMMENTS

Here 'alpha' is the number of atoms the two rings have in common.


REFERENCES

James B. Hendrickson and Camden A. Parks, "Generation and Enumeration of Carbon Skeletons", J. Chem. Inf. Comput. Sci., vol. 31 (1991), pp. 101107. See Table VII column 5 on page 104.


LINKS

Table of n, a(n) for n=5..15.


EXAMPLE

If n=5 then the number of bicyclics when 'alpha' = three is 1.
If n=6 then the number of bicyclics when 'alpha' = three is 3.
If n=7 then the number of bicyclics when 'alpha' = three is 11.
If n=8 then the number of bicyclics when 'alpha' = three is 35.


CROSSREFS

Cf. A121330, A121331, A121332, A121333, A125064.
Sequence in context: A109196 A032637 A034576 * A107683 A259400 A320087
Adjacent sequences: A125669 A125670 A125671 * A125673 A125674 A125675


KEYWORD

nonn


AUTHOR

Parthasarathy Nambi, Jan 29 2007


STATUS

approved



