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Where A098018(k)=-n.
1

%I #5 Feb 05 2014 20:18:04

%S 3,18,12,108,24,72,168,384,360,456,720,1824,1368,3192,19260,6840,

%T 13680,21000,80940,9576,50616,39120,220248,167808,264264,193800,

%U 242820,181944,117360,424080,456456,848160,124488,2756520,1618344,3269112,2229840

%N Where A098018(k)=-n.

%C k is the first occurrence of -n in A098018.

%t f[n_] := Plus @@ MoebiusMu[ Drop[ Divisors[n], 1] - 1]; s = Table[0, {100}]; Do[ a = f[n]; If[ !Positive[a] && a > -101 && s[[ -a]] == 0, s[[ -a]] = n], {n, }]; s

%Y Cf. A098018, A098869.

%K nonn

%O 1,1

%A _Leroy Quet_ and _Robert G. Wilson v_, Nov 03 2004