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A125672
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Classification of bicyclics with the parameter 'alpha' having the value of 3. See the paper by Hendrickson and Parks for details.
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1, 3, 11, 35, 113, 351, 1093, 3348, 10218, 30906, 93005
(list; graph; refs; listen; history; internal format)
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OFFSET
| 5,2
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COMMENTS
| Here 'alpha' is the number of atoms the two rings have in common.
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REFERENCES
| James B. Hendrickson and Camden A. Parks, "Generation and Enumeration of Carbon Skeletons", J. Chem. Inf. Comput. Sci., vol. 31 (1991), pp. 101-107. See Table VII column 5 on page 104.
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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.
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CROSSREFS
| Cf. A121330, A121331, A121332, A121333, A125064.
Sequence in context: A109196 A032637 A034576 * A107683 A014335 A147474
Adjacent sequences: A125669 A125670 A125671 * A125673 A125674 A125675
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KEYWORD
| nonn
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AUTHOR
| Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Jan 29 2007
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