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 A102161 #12 Aug 14 2021 13:12:45 %S A102161 2,7,31,6367,925189,107197144969, %T A102161 93402566446301441282188479643762853393, %U A102161 3661745072013869917446592871282724637510478109647679973 %N A102161 Iccanobirt primes (11 of 15): Prime numbers in A102121. %C A102161 Next term is too large to include. %F A102161 a(n) = A102121(A102141(n)). %Y A102161 Cf. A000040, A102121, A102141, A102151-A102165. %K A102161 nonn,base,less %O A102161 1,1 %A A102161 _Jonathan Vos Post_ and _Ray Chandler_, Dec 31 2004 %E A102161 Offset changed to 1 by _Jinyuan Wang_, Aug 14 2021