Indices of records in A004290.

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =9a(5) =18a(6) =36a(7) =72a(8) =99a(9) =198a(10) =396a(11) =792a(12) =999a(13) =1998a(14) =3996a(15) =7992a(16) =9999a(17) =10989a(18) =19998a(19) =21978a(20) =39996a(21) =43956a(22) =76923a(23) =99999a(24) =199998a(25) =399996a(26) =729927a(27) =999999