A260892 Primes that contain only the digits (1, 7, 8).

7, 11, 17, 71, 181, 787, 811, 877, 881, 887, 1117, 1171, 1181, 1187, 1777, 1787, 1811, 1871, 1877, 7177, 7187, 7717, 7817, 7877, 8111, 8117, 8171, 8887, 11117, 11171, 11177, 11717, 11777, 11887, 17117, 17881, 18181, 18787, 71171, 71711, 71777, 71881, 71887

Offset

1,1

Comments

A020455, A020456 and A020470 are subsequences.

Links

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

Mathematica

Select[Prime[Range[2 10^5]], Complement[IntegerDigits[#], {1, 7, 8}] == {} &]

Prog

(Magma) [p: p in PrimesUpTo(2*10^5) | Set(Intseq(p)) subset [1, 7, 8]];

Crossrefs

Cf. similar sequences listed in A260889.

Cf. A000040, A020455, A020456, A020470.

Sequence in context: A260891 A276039 A199327 * A020455 A178617 A188074

Adjacent sequences: A260889 A260890 A260891 * A260893 A260894 A260895

Keyword

nonn,easy,base

Author

Vincenzo Librandi, Aug 07 2015

Status

approved