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 A102183 #15 Aug 15 2021 09:31:40 %S A102183 5,9,12,15,16,17,19,21,25,28,33,35,37,46,61,63,70,71,81,82,89,90,100, %T A102183 103,106,121,133,147,204,212,220,263,293,311 %N A102183 Iccanobirt semiprime indices (13 of 15): Indices of semiprime numbers in A102123. %C A102183 No more terms through 200. %F A102183 A102123(a(n)) = A102203(n). %Y A102183 Cf. A001358, A102123, A102171-A102185, A102203. %K A102183 nonn,base,more,less %O A102183 1,1 %A A102183 _Jonathan Vos Post_ and _Ray Chandler_, Dec 31 2004 %E A102183 a(29)-a(31) from _Robert Price_, Nov 10 2018 %E A102183 Offset changed to 1 and a(32)-a(34) from _Jinyuan Wang_, Aug 15 2021