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 A261181 #14 Aug 09 2024 19:20:20
%S A261181 7,79,97,709,797,907,977,997,7079,7907,9007,9907,70009,70079,70099,
%T A261181 70709,70979,70997,70999,77797,77977,77999,79777,79907,79979,79997,
%U A261181 79999,90007,90709,90907,90977,90997,97007,97777,99079,99707,99709,99907,700079
%N A261181 Primes that contain only the digits (0, 7, 9).
%C A261181 A020471 is a subsequence.
%H A261181 Alois P. Heinz, <a href="/A261181/b261181.txt">Table of n, a(n) for n = 1..10000</a>
%H A261181 James Maynard and Brady Haran, <a href="https://www.youtube.com/watch?v=eeoBCS7IEqs">Primes without a 7</a>, Numberphile video (2019)
%t A261181 Select[Prime[Range[6 10^4]], Complement[IntegerDigits[#], {0, 7, 9}] == {} &]
%t A261181 Select[FromDigits/@Tuples[{0,7,9},6],PrimeQ] (* _Harvey P. Dale_, Aug 09 2024 *)
%o A261181 (Magma) [p: p in PrimesUpTo(2*10^5) | Set(Intseq(p)) subset [0, 7, 9]];
%Y A261181 Cf. Primes that contain only the digits (k,7,9): this sequence (k=0), A260893 (k=1), A261182 (k=2), A260382 (k=3), A261183 (k=4), A260831 (k=5), A261184 (k=6), A106110 (k=8).
%Y A261181 Cf. A000040, A020471.
%K A261181 nonn,easy,base
%O A261181 1,1
%A A261181 _Vincenzo Librandi_, Aug 11 2015