This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A260893 #11 Jul 20 2025 17:38:42
%S A260893 7,11,17,19,71,79,97,179,191,197,199,719,797,911,919,971,977,991,997,
%T A260893 1117,1171,1777,1979,1997,1999,7177,7717,7919,9199,9719,9791,11117,
%U A260893 11119,11171,11177,11197,11717,11719,11777,11779,11971,17117,17191,17791,17911
%N A260893 Primes having only {1, 7, 9} as digits.
%C A260893 A020455, A020457 and A020471 are subsequences.
%C A260893 Subsequence of A030096.
%H A260893 Alois P. Heinz, <a href="/A260893/b260893.txt">Table of n, a(n) for n = 1..10000</a>
%H A260893 <a href="/index/Pri#PrimesWithDigits">Index to entries for primes with digits in a given set</a>
%t A260893 Select[Prime[Range[3 10^3]], Complement[IntegerDigits[#], {1, 7, 9}] == {}&]
%o A260893 (Magma) [p: p in PrimesUpTo(3*10^4) | Set(Intseq(p)) subset [1, 7, 9]];
%Y A260893 Cf. similar sequences listed in A260889.
%Y A260893 Cf. A000040, A020455, A020457, A020471, A030096.
%K A260893 nonn,easy,base
%O A260893 1,1
%A A260893 _Vincenzo Librandi_, Aug 11 2015