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%I #26 Mar 01 2023 10:55:14
%S 1,1,1,6,17,109,821,11050,260150
%N Number of simple connected class-1 graphs on n nodes.
%H Gordon Royle, <a href="http://people.csse.uwa.edu.au/gordon/graphs/#class2">Small Graphs: Class 2 Graphs</a>.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/Class1Graph.html">Class 1 Graph</a>
%Y Cf. A099435 (number of simple class-1 graphs on n nodes).
%Y Cf. A099438 (number of connected class-2 graphs on n nodes).
%K nonn,more
%O 1,4
%A _Eric W. Weisstein_, Oct 15 2004
%E More terms from _Vladeta Jovovic_, Jun 30 2007
%E Verified up to a(9) by _Eric W. Weisstein_, Nov 21 2011
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