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 A214704 #19 Jul 14 2025 16:41:29
%S A214704 2,3,7,23,37,73,223,227,233,277,337,373,727,733,773,2237,2273,2333,
%T A214704 2377,2777,3323,3373,3727,3733,7237,7333,7723,7727,22273,22277,22727,
%U A214704 22777,23227,23327,23333,23773,27277,27337,27733,27737,27773,32233,32237,32323
%N A214704 Primes that contain only the digits (2, 3, 7).
%C A214704 The digits are prime numbers excluding 5.
%H A214704 Jason Bard, <a href="/A214704/b214704.txt">Table of n, a(n) for n = 1..10000</a> (first 1000 terms from Vincenzo Librandi)
%t A214704 Flatten[Table[Select[FromDigits/@Tuples[{2,3,7},n],PrimeQ],{n,6}]]
%o A214704 (Magma) [p: p in PrimesUpTo(80000) | Set(Intseq(p)) subset [2,3,7]];
%Y A214704 Subsequence of A019546.
%Y A214704 Cf. A087363 (primes with only prime digits excluding 2).
%Y A214704 Cf. A385776 (main sequence for primes containing three distinct digits).
%K A214704 nonn,base,easy
%O A214704 1,1
%A A214704 _Vincenzo Librandi_, Jul 28 2012