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%I #5 Mar 30 2012 18:38:54
%S 3,81,729,19683,1594323,14348907,387420489,10460353203,94143178827,
%T 7625597484987,205891132094649,1853020188851841,50031545098999707,
%U 12157665459056928801,109418989131512359209,2954312706550833698643
%N Denominators of coefficients in (1+x)^(1/3)-(1-x)^(1/3) power series.
%Y Cf. A068561.
%K easy,frac,nonn
%O 1,1
%A _Benoit Cloitre_, Mar 30 2002