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%I #12 Jan 28 2022 21:52:28
%S 1,1,4,12,53,237,1306,7537,47913,322253,2297874,17191216,134505656,
%T 1095715055,9267223594,81162609328,734511656413,6856030049629,
%U 65899370570285,651338242941020,6611459646337423,68842439737228261
%N Number of weakly connected digraphs with n arcs.
%H Andrew Howroyd, <a href="/A053454/b053454.txt">Table of n, a(n) for n = 0..50</a>
%F Inverse Euler transform of A053418. - _Max Alekseyev_, Jan 22 2010
%o (PARI) \\ See A054733 for G, InvEulerMTS.
%o seq(n)=Vec(subst(Pol(InvEulerMTS(sum(i=0, n, G(i, y+O(y^n))*x^i, O(x*x^n)))), x, 1)) \\ _Andrew Howroyd_, Jan 28 2022
%Y Column sums of A054733.
%Y Row sums of A350789.
%Y Cf. A003085, A053418, A350752.
%K nonn
%O 0,3
%A _Vladeta Jovovic_, Jan 12 2000
%E Extended by _Max Alekseyev_, Jan 22 2010
%E a(0)=1 prepended by _Andrew Howroyd_, Jan 28 2022
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