A323928 - OEIS

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A323928

Number of non-Kekuléan planar polycyclic aromatic hydrocarbons with n hexagons that are derived from peri-condensed, cyclic peri-condensed, or corona-condensed molecules.

0

0, 0, 0, 1, 6, 27, 132, 644, 3165

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OFFSET

1,5

LINKS

Table of n, a(n) for n=1..9.

Wenchen He and Wenjie He, Generation and enumeration of planar polycyclic aromatic hydrocarbons, Tetrahedron 42.19 (1986): 5291-5299. See Table 1.

CROSSREFS

Cf. A003104, A323923-A323930.

Sequence in context: A184279 A299598 A343492 * A360082 A174634 A377153

Adjacent sequences: A323925 A323926 A323927 * A323929 A323930 A323931

KEYWORD

nonn,more,changed

AUTHOR

N. J. A. Sloane, Feb 09 2019

STATUS

approved