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 A248901 #12 Nov 28 2020 06:35:23
%S A248901 1,2,3,4,5,20,29,30,2059,5987,7119,20165,151819,14984624,105181798
%N A248901 Numbers k such that A248891(k) = 1.
%C A248901 If k is in {1, 2, 3, 4, 29, ...} then both numbers k and k+1 are in the sequence.
%o A248901 (PARI) lista(nn) = {my(c=0, q=r=5, s=3, t); forprime(p=9, nn, if(p-2==q, if((t=s^(1+1/c++))>r && t<q, print1(c, ", ")); s=r; r=q); q=p); } \\ _Jinyuan Wang_, Nov 28 2020
%Y A248901 Cf. A001359, A248891, A248902, A248903.
%K A248901 nonn,more
%O A248901 1,2
%A A248901 _Jahangeer Kholdi_ and _Farideh Firoozbakht_, Nov 22 2014
%E A248901 a(13)-a(15) from _Jinyuan Wang_, Nov 28 2020