OFFSET
1,1
COMMENTS
The next term is too large to include.
The next term has 127 digits and there are no additional terms up to 2000 digits. - Harvey P. Dale, Jul 13 2021
LINKS
Seiichi Manyama, Table of n, a(n) for n = 1..6
MATHEMATICA
Select[Table[FromDigits[PadRight[{}, n, {9, 7, 5, 3, 1}]], {n, 30}], PrimeQ] (* Harvey P. Dale, Jul 13 2021 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Seiichi Manyama, Dec 20 2018
STATUS
approved