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 A161891 #2 Mar 31 2012 10:29:30 %S A161891 5,19,29,37,41,43,47,53,59,61,67,71,79,83,89,97 %N A161891 Primes p with the property that every non-solvable transitive permutation group of degree p is alternating or symmetric. %C A161891 Wielandt mentions only p=5, 19, 47, 59. The rest follows from the classification of finite simple groups. %D A161891 Wielandt, Finite Permutation Groups, p. 29. %D A161891 Dixon, Mortimer, Permutation Groups, Springer, 1996, p. 99. %K A161891 nonn %O A161891 1,1 %A A161891 _David Brink_, Jun 21 2009