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%I #6 Sep 04 2017 23:23:48
%S 2,8,32,218,2312,30068,510512,9699908,223092902,6469695548,
%T 200560490132,7420738165088,304250263527212,13082761332180548,
%U 614889782588493752,32589158477199744638,1922760350154212639072
%N Inverse Moebius transform of f(x) = primorial(x) = A002110(x).
%F a(n) = Sum_{d|n} q(d), where q(x) = A002110(x).
%e n=6: divisors = {1,2,3,6}; 2 + 2*3 + 2*3*5 + 2*3*5*7*11*13 = 2 + 6 + 30 + 30030 = 30068.
%Y Cf. A002110.
%K nonn
%O 0,1
%A _Labos Elemer_, Jul 19 2001