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%I #16 Jan 23 2020 14:47:18
%S 1,1,3,4,4,6,6,8,9,8,10,12,12,14,15,16,16,18,18,20,21,20,22,24,25,24,
%T 27,28,28,30,30,32,33,32,35
%N a(n) = sigma(A087979(n))/phi(A087979(n)) or 0 if A087979(n) is not a balanced number.
%e While A088830 includes special balanced numbers, A087979 does not include per definition. Nevertheless, it seems that A087979 consists only of balanced numbers. This is provable at least for special cases.
%Y Cf. A000010, A000203, A087979, A020492 (balanced numbers), A088830.
%K nonn,more
%O 1,3
%A _Labos Elemer_, Nov 17 2003
%E a(24)-a(35) from _Amiram Eldar_, Dec 05 2019 (calculated from the data at A087979)
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