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 A092191 #5 Mar 12 2015 19:02:27 %S A092191 1,2,9,12,14,15,16,18,20,23,24,26,30,32,34,35,36,38,43,44,49,50,54,55, %T A092191 56,57,58,61,62,63,66,67,68,69,73,75,80,84,88,91,93,98,99,100,103,107, %U A092191 108,110,112,114,118,119,124,125,128,133,137,138,146,147,150,151,153 %N A092191 Numbers n such that sum of n-th and (n+1)-th semiprimes is a semiprime. %e A092191 9 is a member because sum of 9th and 10th semiprimes, 25 and 26, is 51 which is a semiprime. %Y A092191 Resulting semiprimes: A092192. %K A092191 easy,nonn %O A092191 1,2 %A A092191 _Zak Seidov_, Feb 23 2004