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 A157353 #12 Jan 22 2021 02:12:59
%S A157353 6,26,34,38,39,51,57,58,62,74,82,86,87,93,106,111,122,123,129,134,142,
%T A157353 146,158,159,178,183,194,201,202,206,213,218,219,221,226,237,247,254,
%U A157353 262,267,274,278,291,298,302,303,309,314,323,326,327,339,346,362,377
%N A157353 Products (semiprimes) of two distinct primes that are not safe primes.
%e A157353 6=2*3; 2 and 3 are not safe primes.
%e A157353 26=2*13; 2 and 13 are not safe primes.
%t A157353 lst={};Do[If[Plus@@Last/@FactorInteger[n]==2,a=Length[First/@FactorInteger[n]];If[a==2,b=First/@FactorInteger[n];c=b[[1]];d=b[[2]];If[ !PrimeQ[(c-1)/2]&&!PrimeQ[(d-1)/2],AppendTo[lst,n]]]],{n,7!}];lst
%Y A157353 Cf. A001358, A005384, A005385, A006881, A007304, A111206, A157342, A157344, A157345, A157346, A157347, A157352.
%K A157353 nonn
%O A157353 1,1
%A A157353 _Vladimir Joseph Stephan Orlovsky_, Feb 27 2009