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 A261267 #11 Jul 20 2025 19:31:29
%S A261267 2,7,227,277,727,2027,2207,2707,2777,7027,7207,7727,20707,22027,22277,
%T A261267 22727,22777,27077,27277,70207,72077,72227,72277,72707,72727,200227,
%U A261267 202277,202777,207227,222007,222707,227027,227207,227707,272227,272777,277007
%N A261267 Primes having only {0, 2, 7} as digits.
%C A261267 A020459 is a subsequence.
%H A261267 Alois P. Heinz, <a href="/A261267/b261267.txt">Table of n, a(n) for n = 1..10000</a>
%H A261267 <a href="/index/Pri#PrimesWithDigits">Index to entries for primes with digits in a given set</a>
%t A261267 Select[Prime[Range[6 10^4]], Complement[IntegerDigits[#], {0, 2, 7}] == {}&]
%o A261267 (Magma) [p: p in PrimesUpTo(2*10^6) | Set(Intseq(p)) subset [0, 2, 7]];
%Y A261267 Cf. Primes that contain only the digits (0,2,k): A036953 (k=1), A260125 (k=3), this sequence (k=7), A261268 (k=9).
%Y A261267 Cf. A000040, A020459.
%K A261267 nonn,easy,base
%O A261267 1,1
%A A261267 _Vincenzo Librandi_, Aug 13 2015