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 A109987 #3 Mar 30 2012 18:40:29 %S A109987 4,9,6,85,87,86,82,15,58,55,51,57,49,46,14,95,94,91,93,74,77 %N A109987 Semiprimes ordered alphabetically by where they occur in A000052. %C A109987 A109986 is primes ordered alphabetically by where they occur in A000052. A109988 is 3-almost primes ordered alphabetically by where they occur in A000052. %e A109987 a(1) = 4 because four is the first semiprime in alphabetical order. %e A109987 a(4) = 85 because eighty-five is the first 2-digit semiprime in alphabetical order. %Y A109987 Cf. A000052, A001358, A109986, A109988. %K A109987 base,easy,nonn,word %O A109987 1,1 %A A109987 _Jonathan Vos Post_, Jul 07 2005