%I #9 Oct 04 2016 15:41:39
%S 1,2,6,20,74,290,1196,5102,22418,100762,462184,2155896,10211440,
%T 49013520,238127606,1169523872,5801045062,29033594556,146509374164,
%U 744892740620,3813481756518,19647505270704,101820931159954,530537879440540,2778251007843926
%N Exponential self-convolution of numbers of rooted trees on n nodes.
%H Alois P. Heinz, <a href="/A006850/b006850.txt">Table of n, a(n) for n = 0..1000</a>
%H <a href="/index/Ro#rooted">Index entries for sequences related to rooted trees</a>
%Y Cf. A000081.
%K nonn
%O 0,2
%A _N. J. A. Sloane_.