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A069678 Primes with either no internal digits or all internal digits are 3. 9
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 131, 137, 139, 233, 239, 331, 337, 431, 433, 439, 631, 733, 739, 839, 937, 2333, 2339, 3331, 4337, 4339, 5333, 6337, 7331, 7333, 9337, 13331, 13337, 13339, 23333, 23339 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..267

MATHEMATICA

Join[Prime[Range[25]], Select[Flatten[Table[10FromDigits[PadRight[{n}, k, 3]]+d, {n, 9}, {d, {1, 3, 7, 9}}, {k, 2, 5}]], PrimeQ]]//Sort (* Harvey P. Dale, Aug 08 2020 *)

CROSSREFS

Cf. A069675, A069676, A069677, A069679, A069680, A069681, A069682, A069683, A069684.

Sequence in context: A062353 A077390 A069677 * A069679 A069680 A069681

Adjacent sequences:  A069675 A069676 A069677 * A069679 A069680 A069681

KEYWORD

nonn,base

AUTHOR

Amarnath Murthy, Apr 06 2002

EXTENSIONS

Offset corrected and name changed by Arkadiusz Wesolowski, Sep 07 2011

STATUS

approved

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Last modified March 6 12:57 EST 2021. Contains 341847 sequences. (Running on oeis4.)