OFFSET
1,1
EXAMPLE
64=8^2 and 46=2*23 is semiprime.
MATHEMATICA
Select[Range[150]^2, PrimeOmega[FromDigits[Reverse[ IntegerDigits[ #]]]]==2&] (* Harvey P. Dale, Sep 20 2011 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Jan 31 2006
STATUS
approved