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 A365610 #24 Sep 21 2023 14:59:45 %S A365610 2,11,-1,10010101,1000011011,-1,10000101011101,1000000010111111,-1, %T A365610 10000000011111011101,1000000000101101111111,-1, %U A365610 10000000000001111011111111,1000000000000111111101110111,-1,10000000000000011101111111011111,1000000000000000010111111111111111,-1 %N A365610 Least prime in which the frequency of every digit is n, or -1 if no such number exists. %C A365610 a(n) = -1 <=> n mod 3 = 0. %H A365610 Alois P. Heinz, <a href="/A365610/b365610.txt">Table of n, a(n) for n = 1..400</a> (first 36 terms from Jean-Marc Rebert) %Y A365610 Cf. A000040, A004022, A087395. %K A365610 sign,base %O A365610 1,1 %A A365610 _Jean-Marc Rebert_, Sep 12 2023