%I #8 Nov 20 2023 00:03:43
%S 20,999,189792,153915460
%N Structure counts for certain radical benzenoidal structures (see Cash and Dias paper for precise definition).
%H Gordon G. Cash and Jerry Ray Dias, <a href="https://doi.org/10.1023/A:1015194511140">Computation, Properties and Resonance Topology of Benzenoid Monoradicals and Polyradicals and the Eigenvectors Belonging to Their Zero Eigenvalues</a>, J. Math. Chem., 30 (2001), 429-444.
%Y Cf. A008793, A128476-A128484.
%K nonn,more
%O 0,1
%A _N. J. A. Sloane_, May 08 2007