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 A113524 #14 Oct 09 2022 05:21:09 %S A113524 25,141,185,235,291,753,851,955,1565,1851,2495,3235,3641,4295,5251, %T A113524 5765,6031,6865,8061,9353,9691,10741,11103,14215,14631,15481,16355, %U A113524 16801,17711,21085,25855,27553,28131,28715,29305,29901 %N A113524 Semiprimes in A056106. %C A113524 Intersection of A056106 and A001358. %H A113524 Michael De Vlieger, <a href="/A113524/b113524.txt">Table of n, a(n) for n = 1..10000</a> %e A113524 a(1) = 25 because A056106(3) = 25 = 5^2 is semiprime. %e A113524 a(36) = 29901 because A056106(100) = 29901 = 3 * 9967 is semiprime. %t A113524 Select[Array[3 #^2 - # + 1 &, 100], PrimeOmega[#] == 2 &] (* _Michael De Vlieger_, Mar 17 2021 *) %Y A113524 Cf. A001358, A056106. %Y A113524 Cf. A113519, A113525, A113527, A113528, A113530. %K A113524 easy,nonn %O A113524 1,1 %A A113524 _Jonathan Vos Post_, Jan 12 2006