A260379 - OEIS

%I #15 Dec 09 2024 14:27:55

%S 3,7,11,13,17,31,37,71,73,113,131,137,173,311,313,317,331,337,373,733,

%T 773,1117,1171,1373,1733,1777,3137,3313,3331,3371,3373,3733,7177,7331,

%U 7333,7717,11113,11117,11131,11171,11173,11177,11311,11317,11717,11731,11777

%N Primes that contain only the digits (1, 3, 7).

%H Alois P. Heinz, <a href="/A260379/b260379.txt">Table of n, a(n) for n = 1..10000</a>

%t Select[Prime[Range[2 10^3]], Complement[IntegerDigits[#], {1, 3, 7}]=={} &]

%o (Magma) [p: p in PrimesUpTo(2*10^4) | Set(Intseq(p)) subset [1, 3, 7]];

%Y Subsequence of A030096 and A155055. A020451, A020455, and A020463 are subsequences.

%Y Cf. similar sequences listed in A260378.

%Y Cf. A000040, A020451, A020455, A020463.

%K nonn,easy,base

%O 1,1

%A _Vincenzo Librandi_, Jul 24 2015