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 A250295 #23 Jan 14 2023 03:09:14 %S A250295 9,11,12,17,18,23,26,31,62,64,67,76,78,84,87,88,123,125,131 %N A250295 Numbers n such that A005165(n) is a semiprime. %C A250295 a(20) >= 150. - _Max Alekseyev_, Aug 26 2021 %H A250295 Hisanori Mishima, <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/matha1/matha130.htm">Factorizations of many number sequences</a> %H A250295 Hisanori Mishima, <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/matha1/matha1301.htm">Factorizations of many number sequences</a> %e A250295 a(1) = 9 so A005165(9) = 326981 = 79 * 4139 is a semiprime. %Y A250295 Cf. A001272, A005165. %K A250295 nonn,more %O A250295 1,1 %A A250295 _Eric Chen_, Dec 24 2014 %E A250295 a(18)-a(19) from _Max Alekseyev_, Aug 26 2021