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Number of labeled triangle-free connected simple graphs on n vertices.
3

%I #8 Jun 11 2021 13:42:16

%S 1,1,3,19,207,3571,93243,3603139,203658087,16725737971,1985745828483,

%T 339119822487139,82867477502576847,28816562818537878931,

%U 14182270437347915240523,9825699599254424454332419

%N Number of labeled triangle-free connected simple graphs on n vertices.

%C LOG transform of A213434.

%C Labeled version of A024607.

%Y Cf. A024607, A213434.

%K nonn,hard

%O 1,3

%A _Brendan McKay_, Jun 11 2021