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A129022 Isomer numbers for the fluorenoid/fluoranthenoid constant-isomer series. +0
2
1, 1, 1, 2, 3, 2, 7, 7, 9, 17, 9, 31, 31, 41, 72, 41, 120, 120 (list; graph; listen)
OFFSET

0,4

COMMENT

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: A118007 A158747 A122697 this_sequence A122076 A014784 A048601

Adjacent sequences: A129019 A129020 A129021 this_sequence A129023 A129024 A129025

KEYWORD

nonn

AUTHOR

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

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.


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