Shadow of N (natural numbers), also of Champernowne's shadow.

Terms

a(0) =1a(1) =13a(2) =16a(3) =20a(4) =25a(5) =31a(6) =38a(7) =46a(8) =55a(9) =65a(10) =76a(11) =197a(12) =511a(13) =526a(14) =687a(15) =758a(16) =839a(17) =1759a(18) =1761a(19) =1883a(20) =1906a(21) =1930a(22) =2182a(23) =2244a(24) =2316a(25) =2398a(26) =3328a(27) =3641a(28) =3874a(29) =3908