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A129022 Isomer numbers for the fluorenoid/fluoranthenoid constant-isomer series. 1
1, 1, 1, 2, 3, 2, 7, 7, 9, 17, 9, 31, 31, 41, 72, 41, 120, 120 (list; graph; refs; listen; history; internal format)
OFFSET

0,4

COMMENTS

This allows a single pentagonal ring among otherwise hexagonal rings.

The terms occur in groups of 5: X, X, Y, X, Y, ...

REFERENCES

J. Brunvoll, B. N. Cyvin, S. J. Cyvin, G. Brinkmann and J. Bornhoft, Z. Naturforsch., 51a, 1073 (1996).

S. J. Cyvin, B. N. Cyvin and J. Brunvoll, J. Molec. Struct. (Theochem), 281, 229 (1993).

J. R. Dias, Chem. Phys. Lett., 185, 10-15 (1991). (*)

J. R. Dias, J. Chem. Inf. Comput. Sci., 32, 203-209 (1992).

J. R. Dias, J. Chem. Inf. Comput. Sci. 33, 117 (1993).

J. R. Dias, Discr. App. Math., 67, 79 (1996).

J. R. Dias, The Periodic Table Set as a Unifying Concept in Going from Benzenoid Hydrocarbons to Fullerene Carbons, in "The Periodic Table: Into the 21st Century", Edited by D.H. Rouvray and R. B. King, Research Studies Press Ltd, Baldock, Hertfordshire, England, 2004, 371-396. [See Section 5.2.]

CROSSREFS

Cf. A129012-A129021, A129023.

Sequence in context: A195401 A158747 A122697 * A122076 A170842 A014784

Adjacent sequences:  A129019 A129020 A129021 * A129023 A129024 A129025

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), May 10 2007

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Last modified February 16 19:06 EST 2012. Contains 205945 sequences.