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 A243960 #17 Jun 24 2014 00:45:17 %S A243960 2,11,17,23,31,41,53,59,79,83,101,113,137,149,167,179,197,229,251,263, %T A243960 269,281,283,311,317,331,349,383,433,439,457,461,463,479,487,499,503, %U A243960 509,521,547,577,593,599,619,641,661,673,683,691,709,739,769,787,809 %N A243960 Primes that do not divide the numbers of the form A242719(n)-1. %C A243960 If a prime p=prime(k) does not divide A242719(i)-1 for i=2,3,...,k, then it is in the sequence. %Y A243960 Cf. A242719. %K A243960 nonn %O A243960 1,1 %A A243960 _Vladimir Shevelev_, Jun 16 2014 %E A243960 More terms from _Peter J. C. Moses_, Jun 17 2014