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 A048403 #16 Aug 13 2024 15:41:57
%S A048403 2,3,5,7,17,71,1717171717171717171717171717171,
%T A048403 1717171717171717171717171717171717171
%N A048403 Primes with consecutive digits that differ exactly by 6.
%C A048403 From _Andrew Howroyd_, Aug 13 2024: (Start)
%C A048403 Terms with more than 1 digit have digits alternating between 1 and 7.
%C A048403 No more terms < 10^3000. (End)
%o A048403 (PARI) upto(limit)={my(L=List([t|t<-[2,3,5],t<=limit]),m=1); while(m<limit, foreach([m*17\10, m*71\10, m*17, m*71], t, if(isprime(t)&&t<=limit, listput(L,t))); m=m*100+1); Vec(L)}
%o A048403 upto(10^100) \\ _Andrew Howroyd_, Aug 13 2024
%Y A048403 Primes in A048408.
%Y A048403 Cf. A048398, A048399, A048400, A048401, A048402, A048404, A048405.
%K A048403 nonn,base
%O A048403 1,1
%A A048403 _Patrick De Geest_, Apr 15 1999
%E A048403 Offset changed by _Andrew Howroyd_, Aug 13 2024