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 A209194 #12 Dec 22 2024 12:22:38 %S A209194 2,23,83,89,113,419,509,659,1049,1889,3359,4409,9029,10709,11549, %T A209194 13649,20789,23099,57329,84629,90089,113189,115499,207479,210209, %U A209194 270269,314159,324869,330329,420419,570569,658349,660659,810809,840839,1021019,1138829 %N A209194 Sophie Germain primes that are also highly cototient numbers. %H A209194 PrimeFan, <a href="http://primefan.tripod.com/EsotericIntegerSequences.html">Listing of Esoteric Integer Sequences</a> %H A209194 PrimeFan, <a href="/A031214/a031214.pdf">Esoteric Integer Sequences</a> [Cached copy] %Y A209194 A005384 INTERSECT A100827. %K A209194 nonn %O A209194 1,1 %A A209194 _N. J. A. Sloane_, Mar 05 2012