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%I #11 Oct 13 2017 21:38:16
%S 0,1,1,3,8,23,62,181,513,1513,4476,13483,40933,125845,389769,1217590,
%T 3828775,12115966,38546124,123238296,395725493,1275733730,4127339091,
%U 13396443708,43610621823,142354979662,465838195260,1527905193504,5022061115901,16539625666670,54571760414658
%N Satisfies Sum_{n>=0} a(n)*x^n = x / Product_{n>=0} (1 - x^n/(1 - x^n))^a(n).
%C Which kind of trees is counted by this sequence (compare to A000081, A004111, A073075, A248869 and A115593)?
%Y Cf. A248869.
%K nonn
%O 0,4
%A _Joerg Arndt_, Mar 04 2015