a(n) is the least number whose sum of digits in primorial base equals n.

Terms

a(0) =0a(1) =1a(2) =3a(3) =5a(4) =11a(5) =17a(6) =23a(7) =29a(8) =59a(9) =89a(10) =119a(11) =149a(12) =179a(13) =209a(14) =419a(15) =629a(16) =839a(17) =1049a(18) =1259a(19) =1469a(20) =1679a(21) =1889a(22) =2099a(23) =2309a(24) =4619a(25) =6929a(26) =9239a(27) =11549a(28) =13859a(29) =16169