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%I #11 Mar 16 2023 19:46:43
%S 1,1,2,20,574,48854,12444800,9849180230,25265372689314,
%T 218451490123178684,6562780921564838071734,
%U 700270642102506752862044142,269621199012416753533007480951824,378982029174285293421133982496722212766,1962119228020498122395242424575089505014761082
%N Number of digraphs on n unlabeled nodes with a global source and sink.
%H Andrew Howroyd, <a href="/A350794/b350794.txt">Table of n, a(n) for n = 1..50</a>
%H Andrew Howroyd, <a href="/A350794/a350794_1.txt">PARI Program</a>, Jan 2022, updated Mar 2023.
%o (PARI) A350794seq(15) \\ See link for program code.
%Y The labeled version is A350790.
%Y Row sums of A350795.
%Y Cf. A049531, A051421, A345258, A350360, A350796.
%K nonn
%O 1,3
%A _Andrew Howroyd_, Jan 19 2022
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