OFFSET
1,2
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[Range[0, 200], PrimeQ[FromDigits[Join[{6}, IntegerDigits[#], {1}]]]&] (* Harvey P. Dale, Jun 20 2020 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, May 15 1998
EXTENSIONS
Offset changed by Andrew Howroyd, Aug 11 2024
STATUS
approved