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 A137833 #16 Aug 02 2025 12:24:58
%S A137833 37,73,337,733,32233,32257,32353,32377,32537,33223,35227,35257,35323,
%T A137833 35327,35537,72253,72337,72353,72577,73277,73327,73523,73553,75223,
%U A137833 75253,75577,77237,77323,77527,77557,3223357,3223537,3225323,3225737
%N A137833 Emirps with a prime number of only prime digits.
%H A137833 Harvey P. Dale, <a href="/A137833/b137833.txt">Table of n, a(n) for n = 1..10000</a>
%F A137833 Subsequence of A128388.
%t A137833 Select[Prime@Range[235000], # != IntegerReverse[ # ] && PrimeQ[IntegerReverse[ # ]] && ContainsOnly[IntegerDigits[ # ], {2,3,5,7}] &&PrimeQ[IntegerLength[#]]&] (* _James C. McMahon_, Jun 03 2025 *)
%t A137833 Table[Select[FromDigits/@Tuples[{2,3,5,7},p],!PalindromeQ[#]&&AllTrue[{#,IntegerReverse[#]},PrimeQ]&],{p,Prime[Range[4]]}]//Flatten (* _Harvey P. Dale_, Aug 02 2025 *)
%Y A137833 Cf. A137834, A137835.
%K A137833 base,nonn
%O A137833 1,1
%A A137833 _Lekraj Beedassy_, Feb 12 2008
%E A137833 More terms from _Sean A. Irvine_, Mar 23 2010