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 A102155 #11 Aug 12 2021 02:48:42 %S A102155 2,7,13,541549,6058778554555591 %N A102155 Iccanobirt primes (5 of 15): Prime numbers in A102115. %C A102155 Next term is too large to include. %F A102155 a(n) = A102115(A102135(n)). %Y A102155 Cf. A000040, A102115, A102151-A102165. %K A102155 nonn,base,less %O A102155 1,1 %A A102155 _Jonathan Vos Post_ and _Ray Chandler_, Dec 31 2004 %E A102155 Offset changed to 1 by _Jinyuan Wang_, Aug 12 2021