OFFSET
1,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[Prime[Range[100]], PrimeQ[Total[Select[IntegerDigits[#], PrimeQ]]]&] (* Harvey P. Dale, Oct 22 2025 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Harvey Dale, May 31 2004
STATUS
approved
