%I #7 Jun 14 2021 10:02:35
%S 1,1,2,3,8,17,55,166,675,2977,15553,90159,586769,4197170,32919812,
%T 281235872,2609796620
%N Number of unlabeled 2-connected simple graphs with girth at least 6.
%C The girth is the length of the shortest cycle, so girth at least 6 means there are no cycles of length 3, 4 or 5.
%Y A345246 for girth at least 4.
%Y A140440 for girth at least 5.
%K nonn,more
%O 6,3
%A _Brendan McKay_, Jun 14 2021