%I #14 Jun 01 2014 03:12:42
%S 1,11,176,3476,80146,2093014,60684184,1925761904,66178495724,
%T 2442338082404,96153966959776,4016198275877776,177154100553295096,
%U 8220076099025550056,399875590850824743776,20334017317908076095104
%N Number of labeled servers of dimension 11.
%H Vincenzo Librandi, <a href="/A027398/b027398.txt">Table of n, a(n) for n = 0..200</a>
%H R. Donaghey, <a href="http://dx.doi.org/10.1016/0097-3165(76)90060-1">Binomial self-inverse sequences and tangent coefficients</a>, J. Combin. Theory, Series A, 21 (1976), 155-163.
%F E.g.f.: exp( sum( ((1+x)^i-1)/i, i=1..11 ) ).
%t Table[n!*SeriesCoefficient[E^(Sum[((1+x)^i - 1)/i, {i, 1, 11}]), {x, 0, n}], {n, 0, 20}] (* _Vincenzo Librandi_, Dec 31 2012 *)
%K nonn
%O 0,2
%A _Olivier GĂ©rard_