A128483 Structure counts for certain radical benzenoidal structures (see Cash and Dias paper for precise definition).

980, 189792, 39045432, 10457948644, 3859415491248, 2000179735422600

Offset

0,1

Links

Table of n, a(n) for n=0..5.

Gordon G. Cash and Jerry Ray Dias, Computation, Properties and Resonance Topology of Benzenoid Monoradicals and Polyradicals and the Eigenvectors Belonging to Their Zero Eigenvalues, J. Math. Chem., 30 (2001), 429-444.

Crossrefs

Cf. A008793, A128476-A128484.

Sequence in context: A157515 A188337 A109120 * A056937 A251839 A391165

Adjacent sequences: A128480 A128481 A128482 * A128484 A128485 A128486

Keyword

nonn,more

Author

N. J. A. Sloane, May 08 2007

Status

approved