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 A102175 #15 Aug 12 2021 02:49:00 %S A102175 5,11,12,16,17,24,28,29,43,64,70,89,94,109,134,136,138,158,194,219,316 %N A102175 Iccanobirt semiprime indices (5 of 15): Indices of semiprime numbers in A102115. %F A102175 A102115(a(n)) = A102195(n). %Y A102175 Cf. A001358, A102115, A102171-A102185, A102195. %K A102175 nonn,more,less,base %O A102175 1,1 %A A102175 _Jonathan Vos Post_ and _Ray Chandler_, Dec 31 2004 %E A102175 a(20) from _Robert Price_, Nov 08 2018 %E A102175 Offset changed to 1 and a(21) from _Jinyuan Wang_, Aug 12 2021