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Harmonic mean of digits is 6.
0

%I #4 May 10 2013 12:44:47

%S 6,66,488,666,848,884,3999,4688,4868,4886,6488,6666,6848,6884,8468,

%T 8486,8648,8684,8846,8864,9399,9939,9993,36999,38888,39699,39969,

%U 39996,44999,46688,46868,46886,48668,48686,48866,49499,49949,49994,63999

%N Harmonic mean of digits is 6.

%t Do[ h = IntegerDigits[n]; If[ Sort[h][[1]] != 0 && Length[h]/Apply[Plus, 1/h] == 6, Print[n]], {n, 1, 10^6}]

%Y Cf. A062179-A062185, A061383-A061388, A061423-A061425.

%K base,easy,nonn

%O 1,1

%A _Vladeta Jovovic_, Jun 12 2001

%E More terms from _Robert G. Wilson v_, Aug 08 2001