1,5
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.
Cf. A003104, A323923-A323930.
Sequence in context: A184279 A299598 A343492 * A174634 A018901 A215704
Adjacent sequences: A323925 A323926 A323927 * A323929 A323930 A323931
nonn,more
N. J. A. Sloane, Feb 09 2019
approved
