OFFSET
1,1
COMMENTS
EXAMPLE
a(6)=223 because 6th composite number is 12: A002808(6)=12, then 12=2*2*3 and merging prime factors we get a(6)=223.
MATHEMATICA
Sow[FromDigits@Flatten[Table[IntegerDigits[ #[[1]]], {#[[2]]}]&/@FactorInteger@(n)]]], {n, 2, 115}]][[2, 1]]
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Zak Seidov, Jun 03 2006
STATUS
approved