In decimal representation of n, replace composite digits (4, 6, 8 and 9) with their concatenated prime factorizations (22, 23, 222 and 33).

A073647

In decimal representation of n, replace composite digits (4, 6, 8 and 9) with their concatenated prime factorizations (22, 23, 222 and 33).

Terms

    a(0) =1a(1) =2a(2) =3a(3) =22a(4) =5a(5) =23a(6) =7a(7) =222a(8) =33a(9) =10a(10) =11a(11) =12a(12) =13a(13) =122a(14) =15a(15) =123a(16) =17a(17) =1222a(18) =133a(19) =20a(20) =21a(21) =22a(22) =23a(23) =222a(24) =25a(25) =223a(26) =27a(27) =2222a(28) =233a(29) =30

External references