%I #5 Feb 25 2023 20:57:58
%S 1,2,5,9,19,44,111,328,1090,3988,15838,67295,301417,1412821,6882398,
%T 34682721,180170661,962288228,5273162329
%N Number of unlabeled nonseparable (or 2-connected) multigraphs with n edges, loops allowed.
%Y Row sums of A360880.
%Y Cf. A007717, A007719, A010357.
%K nonn,more
%O 1,2
%A _Andrew Howroyd_, Feb 25 2023