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 A102163 #12 Aug 15 2021 09:31:10 %S A102163 2,7,31,761,380372309031901,398539497395051,6619750198532765321, %T A102163 895548435204819863285711,324218089757469614354964262603, %U A102163 6299327678849021718683330197124506131574064354457936929 %N A102163 Iccanobirt primes (13 of 15): Prime numbers in A102123. %C A102163 Next term is too large to include. %F A102163 a(n) = A102123(A102143(n)). %Y A102163 Cf. A000040, A102123, A102143, A102151-A102165. %K A102163 nonn,base,less %O A102163 1,1 %A A102163 _Jonathan Vos Post_ and _Ray Chandler_, Dec 31 2004 %E A102163 Offset changed to 1 by _Jinyuan Wang_, Aug 15 2021