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 A106098 #7 Nov 09 2019 04:14:34 %S A106098 41,43,241,401,421,431,433,443,1423,1433,2141,2143,2243,2341,2411, %T A106098 2423,2441,3041,3343,3413,3433,4001,4003,4013,4021,4111,4133,4201, %U A106098 4211,4231,4241,4243 %N A106098 Primes with maximal digit = 4. %H A106098 Amiram Eldar, <a href="/A106098/b106098.txt">Table of n, a(n) for n = 1..10000</a> %t A106098 Select[Prime[Range[600]], Max[IntegerDigits[ # ]]==4&] %Y A106098 Cf. A106100, A106099, A106097, A106096, A106095, A106094, A106093. %K A106098 nonn,base %O A106098 1,1 %A A106098 _Zak Seidov_, May 07 2005