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 A069682 #13 Jan 26 2023 15:07:31 %S A069682 2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89, %T A069682 97,173,179,271,277,373,379,479,571,577,673,677,773,877,971,977,1777, %U A069682 2777,3779,5779,6779,8779,27773,27779,47777,47779,57773,67777,77773,97771 %N A069682 Primes with either no internal digits or all internal digits are 7. %Y A069682 Cf. A069675, A069676, A069677, A069678, A069679, A069680, A069681, A069683, A069684. %K A069682 nonn,base %O A069682 1,1 %A A069682 _Amarnath Murthy_, Apr 06 2002 %E A069682 Corrected by _Ray Chandler_, Nov 24 2003 %E A069682 Offset corrected and name changed by _Arkadiusz Wesolowski_, Sep 07 2011