A061546 - OEIS

%I #4 May 10 2013 12:44:46

%S 7,77,777,7777,77777,777777,3999999,4688999,4689899,4689989,4689998,

%T 4698899,4698989,4698998,4699889,4699898,4699988,4868999,4869899,

%U 4869989,4869998,4886999,4888888,4889699,4889969,4889996,4896899

%N Harmonic mean of digits is 7.

%e 6666999 is a term since 7/(1/6+1/6+1/6+1/6+1/9+1/9+1/9)=7.

%t Do[ h = IntegerDigits[n]; If[ Sort[h][[1]] != 0 && Length[h]/Apply[Plus, 1/h] == 7, 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 13 2001

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