A260271 Primes having only {1, 4, 9} as digits.

11, 19, 41, 149, 191, 199, 419, 449, 491, 499, 911, 919, 941, 991, 1499, 1949, 1999, 4111, 4441, 4919, 4999, 9199, 9419, 9491, 9941, 9949, 11119, 11149, 11411, 11491, 11941, 14149, 14411, 14419, 14449, 19141, 19441, 19919, 19949, 19991, 41141, 41149, 41411

Offset: 1

Author

Vincenzo Librandi, Jul 23 2015

Keywords

• nonn
• easy
• base

Comments

A020452, A020457 and A020466 are subsequences.

Links

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

Crossrefs

Cf. similar sequences listed in A260266.

Cf. A020452, A020457, A020466.

Programs

Magma

[p: p in PrimesUpTo(5*10^4) | Set(Intseq(p)) subset [1, 4, 9]];

Mathematica

Select[Prime[Range[5 10^3]], Complement[IntegerDigits[#], {1, 4, 9}]=={} &]