It is possible that the definition should say "connected" rather than "biconnected". Should be rechecked! - Max Alekseyev and Brendan McKay, Jun 17 2008
Table of n, a(n) for n=1..11.
Keith M. Briggs, Combinatorial Graph Theory
A diagonal of triangle in A126749.
Sequence in context: A199107 A280668 A198508 * A264820 A194534 A331712
Adjacent sequences: A126751 A126752 A126753 * A126755 A126756 A126757
N. J. A. Sloane, Feb 18 2007
a(11) from Michael Sollami, Feb 18 2012