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%I #15 Oct 28 2021 03:57:49
%S 1,2,16,400,28544,5531648,2818499584
%N Number of quasitransitive relations on n labeled nodes.
%C Quasitransitivity is weaker than transitivity.
%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Quasitransitive_relation">Quasitransitive relation</a>
%Y Cf. A006905 (number of transitive relations on n labeled nodes).
%K nonn,hard,more
%O 0,2
%A _Dave Palfrey_, Sep 19 2021
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