Sum of digits of n a(n) is n ( = A003634/n), or 0 if no such number exists.

Terms

a(0) =1a(1) =9a(2) =9a(3) =3a(4) =9a(5) =9a(6) =3a(7) =9a(8) =9a(9) =1a(10) =18a(11) =9a(12) =9a(13) =9a(14) =9a(15) =9a(16) =9a(17) =9a(18) =6a(19) =9a(20) =18a(21) =6a(22) =9a(23) =9a(24) =6a(25) =9a(26) =9a(27) =4a(28) =9a(29) =9