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 A124785 #2 Mar 30 2012 17:26:22 %S A124785 4,6,9,10,10,15,14,21,25,14,22,33,26,39,22,34,49,55,22,46,26,69,34,85, %T A124785 26,62,91,46,74,38,111,115,82,86,34,129,133,58,141,34,106,159,169,38, %U A124785 183,134,201,142,213,94,235,74,166,46,253,106,259,58,265,46,86,118,194 %N A124785 Semiprime sopfr of semiprimes A115585. %C A124785 Cf. A001358 semiprimes, A001414 sopfr, A115585 Semiprimes with a semiprime sum of factors, A124786 Intersection of A115585 and A124785. %F A124785 a(n)=sopfr(A115585(n)) %e A124785 a(3)=9 because A115585(3)=14=2*7=>2+7=9=3*3, %e A124785 a(6)=15 because A115585(6)=26=2*13=>2+13=15=3*5. %Y A124785 Cf. A001358, A001414, A115585, A124786. %K A124785 nonn %O A124785 1,1 %A A124785 _Zak Seidov_, Nov 07 2006