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%I #5 Jan 14 2022 19:45:53
%S 1,0,0,1,1,3,7,27,120,590,3172,18291,112597,731646,5002261,35805035,
%T 267427870,2077890719,16753007782,139843832074,1206213748404,
%U 10731971520412,98340872850392,926788397662602,8971598464914888,89105060389927172,907030917078092542
%N Number of unlabeled strongly connected oriented graphs with n arcs.
%o (PARI) A350751seq(20) \\ See PARI link in A350489 for program code.
%Y Column sums of A350750.
%Y Cf. A350489, A350752.
%K nonn
%O 0,6
%A _Andrew Howroyd_, Jan 14 2022