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 A167281 #11 Nov 01 2022 15:26:23
%S A167281 5557,15551,15559,45553,45557,55501,55511,55529,55541,55547,55579,
%T A167281 55589,65551,65557,75553,75557,105557,115553,125551,135559,155501,
%U A167281 155509,155521,155537,155539,155557,155569,155579,155581,155593,155599,165551
%N A167281 Primes containing the string 555.
%H A167281 Vincenzo Librandi, <a href="/A167281/b167281.txt">Table of n, a(n) for n = 1..1000</a>
%F A167281 a(n) ~ n log n. - _Charles R Greathouse IV_, Nov 01 2022
%t A167281 p555Q[n_] := Module[{idn=IntegerDigits[n]}, MemberQ[Partition[idn, 3, 1], {5, 5, 5}]]; Select[Prime[Range[16000]], p555Q] (* _Vincenzo Librandi_, Sep 15 2013 *)
%Y A167281 Cf. A166571-A166573, A166579-A166582.
%K A167281 nonn,base
%O A167281 1,1
%A A167281 _Vincenzo Librandi_, Nov 01 2009