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 A033947 #7 Mar 30 2012 18:34:52 %S A033947 1,-1,2,-2,2,2,3,2,-2,2,3,2,6,3,-2,2,2,2,2,-2,5,-2,2,3,5,2,-2,2,6,3,3, %T A033947 2,3,2,2,-5,5,2,-2,2,2,2,-2,5,2,-2,2,3,2,6,3,-2,7,-3,3,-2,2,-2,5,3,3, %U A033947 2,5,-2,10,2,3,10,2,2,3,-2,-2,2,2,-2,2,5,3,21,2,2,-5,5,-5,2,3,13,2,-2 %N A033947 Smallest primitive root (in absolute value) of n-th prime. %Y A033947 Cf. A001918, A002199, A000040. %K A033947 sign %O A033947 1,3 %A A033947 Calculated by _Jud McCranie_