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 A102179 #10 Aug 14 2021 07:12:47 %S A102179 5,9,17,18,20,25,28,29,35,41,48,50,51,58,67,74,90,94,107,108,135,137, %T A102179 159,165,186,254,290 %N A102179 Iccanobirt semiprime indices (9 of 15): Indices of semiprime numbers in A102119. %F A102179 A102119(a(n)) = A102199(n). %Y A102179 Cf. A001358, A102119, A102171-A102185, A102199. %K A102179 nonn,more,less,base %O A102179 1,1 %A A102179 _Jonathan Vos Post_ and _Ray Chandler_, Dec 31 2004 %E A102179 Offset changed to 1 and a(26)-a(27) from _Jinyuan Wang_, Aug 14 2021