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 A180268 #3 Mar 30 2012 17:40:25 %S A180268 4,988,1612,3172,5332,7852,11908,18748,19276,21268,21508,25156,32188, %T A180268 35932,41116,41452,43108,50236,54436,55876,57412,62452,65836,71248, %U A180268 72748,74572,85828,88996,96772,97708,99292,103948,104956,105772,110812,116356,116428 %N A180268 Numbers n, not divisible by 3, 5, 7 or 11, such that A000203(n)-n-1 and 2*n+1-A000203(n) are prime numbers. %Y A180268 Cf. A157449, A175727 and A179945. %K A180268 nonn,less %O A180268 1,1 %A A180268 Alexey Galkin (fetch91(AT)gmail.com), Aug 23 2010 %E A180268 Divisibility requirement added to definition to match the sequence; 4 and terms beyond 7852 added - _R. J. Mathar_, Aug 25 2010