A129021 A129017 with the third term from each triple omitted.

1, 1, 2, 4, 12, 19, 46, 70, 162, 239, 504, 726, 1471, 2062

Offset

0,3

References

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.

Links

Table of n, a(n) for n=0..13.

Jerry Ray Dias, Constant-isomer benzenoid series and their polyradical subsets, Theoretica Chimica Acta 81(3) (1991), 125-138; see Table 2 on p. 129.

Jerry Ray Dias, Notes on constant-isomer series, J. Chem. Inf. Comput. Sci. 33 (1993), pp. 117-127; see p. 123.

Jerry Ray Dias, Graph theoretical invariants and elementary subgraphs of polyhex and polypent/polyhex systems of chemical relevance, Discr. App. Math. 67 (1-3) (1996), pp. 79-114; see p. 98.

Crossrefs

Cf. A129012-A129021.

Sequence in context: A309659 A309664 A024872 * A290440 A090922 A056228

Adjacent sequences: A129018 A129019 A129020 * A129022 A129023 A129024

Keyword

nonn,more

Author

N. J. A. Sloane, based on email from Jerry R. Dias (DiasJ(AT)umkc.edu), May 08 2007

Extensions

Name edited by Petros Hadjicostas, Nov 17 2019

Status

approved