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%I #16 Dec 15 2017 05:48:13
%S 1,-23,253,-1495,4831,-5819,-16743,82985,-113390,-111113,534613,
%T -378235,-577737,385089,1222243,1070121,-6905933,2607970,10661421,
%U -7222345,-4235979,-12296099,18643273,20995205,-25494394,13287951
%N Dirichlet convolution of [ 1,1,1,... ] with Ramanujan numbers (A000594).
%C Multiplicative because both A000012 and A000594 are. - _Christian G. Bower_, May 16 2005
%H G. C. Greubel, <a href="/A034777/b034777.txt">Table of n, a(n) for n = 1..10000</a>
%t Table[DivisorSum[k, RamanujanTau], {k, 50}] (* _Jan Mangaldan_, Mar 15 2013 *)
%K sign,mult
%O 1,2
%A _N. J. A. Sloane_