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A182161 Number of extensional acyclic digraphs on n labeled nodes. 3

%I #12 Aug 17 2020 13:17:44

%S 1,1,2,12,216,10560,1297440,381013920,258918871680,398362519618560,

%T 1366301392119014400,10325798296570753920000,

%U 170397664079650720884864000,6094923358716319193283074457600,469649545161250827117772066578739200,77556106803568453086056722450983544320000

%N Number of extensional acyclic digraphs on n labeled nodes.

%H S. Wagner, <a href="http://math.sun.ac.za/swagner/DigraphsFull.pdf">Asymptotic enumeration of extensional acyclic digraphs</a>, in Proceedings of the SIAM Meeting on Analytic Algorithmics and Combinatorics (ANALCO12).

%F a(n) = n!*A001192(n).

%Y Cf. A001192, A003024. Row sums of A182162.

%K nonn

%O 0,3

%A _N. J. A. Sloane_, Apr 15 2012

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Last modified March 29 05:48 EDT 2024. Contains 371265 sequences. (Running on oeis4.)