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 A113528 #14 Oct 09 2022 05:20:31 %S A113528 6,34,57,86,121,209,262,321,386,706,1241,1366,1497,2582,2761,3334, %T A113528 3746,3961,4881,5377,6166,6722,7009,7601,8857,9862,10562,10921,12417, %U A113528 13201,14422,15697,17026,17481,17942,18409,19361,19846,20337,21337,22361 %N A113528 Semiprimes in A056109. %C A113528 Intersection of A056109 and A001358. %H A113528 Michael De Vlieger, <a href="/A113528/b113528.txt">Table of n, a(n) for n = 1..10000</a> %e A113528 a(1) = 6 because A056109(1) = 3*1^2 + 2*1 + 1 = 6 = 2 * 3 is semiprime. %t A113528 Select[Array[3 #^2 + 2 # + 1 &, 87], PrimeOmega[#] == 2 &] (* _Michael De Vlieger_, Mar 17 2021 *) %Y A113528 Cf. A001358, A056109. %Y A113528 Cf. A113519, A113524, A113525, A113527, A113530. %K A113528 easy,nonn %O A113528 1,1 %A A113528 _Jonathan Vos Post_, Jan 12 2006