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Indices of harmonic (or Ore) numbers (A001599) that are also perfect numbers.
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%I #5 Aug 25 2012 21:24:32

%S 2,3,6,11,59,176,310

%N Indices of harmonic (or Ore) numbers (A001599) that are also perfect numbers.

%Y Cf. A000396, A001599.

%K more,nonn

%O 1,1

%A _Omar E. Pol_, Jan 19 2009

%E a(6)-a(7) from _Donovan Johnson_, Aug 25 2012