A261267 Primes that contain only the digits (0, 2, 7).

2, 7, 227, 277, 727, 2027, 2207, 2707, 2777, 7027, 7207, 7727, 20707, 22027, 22277, 22727, 22777, 27077, 27277, 70207, 72077, 72227, 72277, 72707, 72727, 200227, 202277, 202777, 207227, 222007, 222707, 227027, 227207, 227707, 272227, 272777, 277007

Offset

1,1

Comments

A020459 is a subsequence.

Links

Alois P. Heinz, Table of n, a(n) for n = 1..10000

Mathematica

Select[Prime[Range[6 10^4]], Complement[IntegerDigits[#], {0, 2, 7}] == {}&]

Prog

(Magma) [p: p in PrimesUpTo(2*10^6) | Set(Intseq(p)) subset [0, 2, 7]];

Crossrefs

Cf. Primes that contain only the digits (0,2,k): A036953 (k=1), A260125 (k=3), this sequence (k=7), A261268 (k=9).

Cf. A000040, A020459.

Sequence in context: A181864 A096463 A048560 * A020459 A343899 A088106

Adjacent sequences: A261264 A261265 A261266 * A261268 A261269 A261270

Keyword

nonn,easy,base

Author

Vincenzo Librandi, Aug 13 2015

Status

approved