A323925 Number of 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, 2, 12, 66, 331, 1678

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: A369111 A334772 A197745 * A039633 A265451 A381107

Adjacent sequences: A323922 A323923 A323924 * A323926 A323927 A323928

Keyword

nonn,more

Author

N. J. A. Sloane, Feb 09 2019

Status

approved