OFFSET
1,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..26
EXAMPLE
a(2)=449 is a term because all digits are equal to 4 except one.
MATHEMATICA
Select[Flatten[Table[FromDigits[PadLeft[{n}, x, 4]], {x, 3, 30}, {n, {1, 3, 7, 9}}]], PrimeQ] (* Harvey P. Dale, Feb 18 2018 *)
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Shyam Sunder Gupta, Apr 29 2005
EXTENSIONS
More terms from Harvey P. Dale, Feb 18 2018
Name clarified by Robert Price, Sep 10 2023
STATUS
approved