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 A086696 #7 Dec 15 2017 17:36:32 %S A086696 3,0,5,1,1,1,1,1,5,3,2,5,6,21,2,9,2,8,4,1,5,9,34,23,4,12,5,8,17,9,10, %T A086696 1,12,11,10,3,0,37,26,3,20,29,16,21,38,41,18,11,6,21,8,7,2,31,30,12, %U A086696 38,69,2,27 %N A086696 Least k such that A056830(n) + k is semiprime, where A056830 = alternate digits 1 and 0. %K A086696 nonn,base %O A086696 1,1 %A A086696 _Jason Earls_, Jul 28 2003