OFFSET
0,1
COMMENTS
Zeros appear for n which are a member of A068191.
If the requirement "positive" is dropped, a(0) becomes 0 instead.
EXAMPLE
a(21)=371 because 371 is the smallest nonprime positive number whose digital product is 21 (3*7*1 = 21).
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Jaroslav Krizek, Oct 25 2011
STATUS
approved