A073647 In decimal representation of n, replace composite digits (4, 6, 8 and 9) with their concatenated prime factorizations (22, 23, 222 and 33).

1, 2, 3, 22, 5, 23, 7, 222, 33, 10, 11, 12, 13, 122, 15, 123, 17, 1222, 133, 20, 21, 22, 23, 222, 25, 223, 27, 2222, 233, 30, 31, 32, 33, 322, 35, 323, 37, 3222, 333, 220, 221, 222, 223, 2222, 225, 2223, 227, 22222, 2233, 50, 51, 52, 53, 522, 55, 523, 57, 5222, 533

Offset

1,2

Links

Table of n, a(n) for n=1..59.

Crossrefs

Sequence in context: A141458 A080670 A288532 * A073646 A037276 A068190

Adjacent sequences: A073644 A073645 A073646 * A073648 A073649 A073650

Keyword

nonn,base

Author

Reinhard Zumkeller, Aug 29 2002

Status

approved