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 A343833 #27 May 06 2021 22:21:01 %S A343833 2,5,7,71,571,857,2857,28571,1428571,71428571,7142857142857, %T A343833 571428571428571,1428571428571428571428571, %U A343833 28571428571428571428571428571,7142857142857142857142857142857,2857142857142857142857142857142857,42857142857142857142857142857142857142857 %N A343833 Prime numbers of the form floor((j/7)*10^k) where 1 <= j <= 6 and k >= 1. %H A343833 K. Kutsenko, <a href="https://github.com/constcut/cyclicprime/raw/main/paper/cyclic_prime_numbers.pdf">Cyclic prime numbers</a> %Y A343833 Cf. A001913, A101202. %K A343833 nonn,base %O A343833 1,1 %A A343833 _Konstantin Kutsenko_, May 01 2021