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%I #16 Apr 17 2021 01:26:04
%S 0,10,110,1020,10120,100040,1001220,10000060,100010240,1000002060,
%T 10000100440,100000000100,1000001022240,10000000000120,
%U 100000010000660,1000000000204080,10000000100020480,100000000000000160,1000000001002002660
%N a(n) = Sum_{d|n} phi(d)*10^(n/d).
%H Seiichi Manyama, <a href="/A054617/b054617.txt">Table of n, a(n) for n = 0..1000</a>
%F Dirichlet convolution of A000010 and A011557. - _R. J. Mathar_, Jan 11 2013
%F a(n) = Sum_{k=1..n} 10^gcd(n,k). - _Ilya Gutkovskiy_, Apr 16 2021
%Y Column k=10 of A185651.
%Y Cf. A054629.
%K nonn
%O 0,2
%A _N. J. A. Sloane_, Apr 16 2000
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