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A073647
In decimal representation of n, replace composite digits (4, 6, 8 and 9) with their concatenated prime factorizations (22, 23, 222 and 33).
0
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
CROSSREFS
Sequence in context: A141458 A080670 A288532 * A073646 A037276 A068190
KEYWORD
nonn,base
AUTHOR
Reinhard Zumkeller, Aug 29 2002
STATUS
approved