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 A154769 #13 Apr 03 2023 10:36:11
%S A154769 1234567891,1234567891234567891234567891,
%T A154769 1234567891234567891234567891234567891234567891234567891234567891234567
%N A154769 Zeroless primes with consecutive digits (1,..,9) starting with 1.
%C A154769 The next term has 4690 digits. - _Harvey P. Dale_, Sep 27 2017
%H A154769 G. L. Honaker, Jr. and Chris Caldwell, <a href="https://t5k.org/curios/cpage/552.html">Prime Curios! 1234567891</a>
%t A154769 Select[Table[FromDigits[PadRight[{},n,Range[9]]],{n,100}],PrimeQ] (* _Harvey P. Dale_, Sep 27 2017 *)
%K A154769 nonn,base,bref
%O A154769 1,1
%A A154769 Kousaka Hideaki (kousaka(AT)d6.dion.ne.jp), Jan 15 2009
%E A154769 Name changed by _Arkadiusz Wesolowski_, Aug 24 2011