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%I #4 Oct 02 2021 16:18:47
%S 1,3,16,187,4181,158484,9573673,887796203,123095499826,25013843421773,
%T 7332464142932061,3060854010476035118,1800064413234246359355,
%U 1477862758280253372432667,1680717420907850482529235664
%N Partial sums of A006905.
%C Partial sums of number of transitive relations on n labeled nodes. After 3, none of the values shown is prime.
%F a(n) = Sum_{i=0..n} A006905(i).
%Y Cf. A006905, A000595, A001173, A091073.
%K nonn
%O 0,2
%A _Jonathan Vos Post_, Mar 09 2010
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