Harmonic mean of digits is 7.

Terms

a(0) =7a(1) =77a(2) =777a(3) =7777a(4) =77777a(5) =777777a(6) =3999999a(7) =4688999a(8) =4689899a(9) =4689989a(10) =4689998a(11) =4698899a(12) =4698989a(13) =4698998a(14) =4699889a(15) =4699898a(16) =4699988a(17) =4868999a(18) =4869899a(19) =4869989a(20) =4869998a(21) =4886999a(22) =4888888a(23) =4889699a(24) =4889969a(25) =4889996a(26) =4896899