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 A228241 #25 Feb 16 2025 08:33:20
%S A228241 2,23,2302585092994045684017991454684364207601
%N A228241 Log 10-primes: primes in the initial decimal digits of log(10).
%C A228241 The next term (a(4)) has 242 digits. - _Harvey P. Dale_, Sep 13 2021
%H A228241 Eric W. Weisstein, <a href="/A228241/b228241.txt">Table of n, a(n) for n = 1..5</a>
%H A228241 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/ConstantPrimes.html">Constant Primes</a>
%H A228241 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/IntegerSequencePrimes.html">Integer Sequence Primes</a>
%H A228241 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/NaturalLogarithmof10Digits.html">Natural Logarithm of 10 Digits</a>
%t A228241 Module[{nn=500,l10},l10=RealDigits[Log[10],10,nn][[1]];Select[ Table[ FromDigits[ Take[l10,n]],{n,nn}],PrimeQ]] (* _Harvey P. Dale_, Sep 13 2021 *)
%Y A228241 Cf. A228240 (integer lengths of log(10)-primes).
%Y A228241 Cf. A002392 (decimal expansion of log(10)).
%K A228241 nonn,base
%O A228241 1,1
%A A228241 _Eric W. Weisstein_, Aug 17 2013