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

Terms

a(0) =0a(1) =1a(2) =5a(3) =21a(4) =17a(5) =159a(6) =23a(7) =1509a(8) =29a(9) =111a(10) =161a(11) =25659a(12) =83a(13) =392949a(14) =1511a(15) =171a(16) =89a(17) =8711259a(18) =113a(19) =184837209a(20) =167a(21) =1521a(22) =25661a(23) =5141378799a(24) =119a(25) =1209a(26) =392951a(27) =741a(28) =1517a(29) =187854439329