A064413(n) written in base of primes, read from right to left, written as a string.

Terms

a(0) =0a(1) =1a(2) =2a(3) =11a(4) =10a(5) =20a(6) =12a(7) =3a(8) =101a(9) =100a(10) =110a(11) =21a(12) =1001a(13) =1000a(14) =1010a(15) =13a(16) =4a(17) =102a(18) =10001a(19) =10000a(20) =10010a(21) =30a(22) =111a(23) =200a(24) =1100a(25) =1002a(26) =100001a(27) =100000a(28) =100010a(29) =22