OFFSET
1,1
EXAMPLE
46=2*23 is semiprime and 64=8^2.
MATHEMATICA
Select[Range[50000], PrimeOmega[#]==2&&IntegerQ[Sqrt[FromDigits[ Reverse[ IntegerDigits[ #]]]]]&] (* Harvey P. Dale, Mar 03 2013 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Jan 31 2006
STATUS
approved