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 A166619 #2 Mar 30 2012 17:26:30 %S A166619 5,67,1523,1987,3119,9323,11783,14551,21019,42929,108191,177337, %T A166619 194527,225227,244753,251417,265123,301123,308569,450503,507523, %U A166619 622067,655351,772789,835249,860891,900241,940403,995611,1141241,1171789,1534727 %N A166619 Primes in A105720. %Y A166619 Cf. A166620 (Positions of primes in A105720), A105720. %K A166619 nonn %O A166619 1,1 %A A166619 _Zak Seidov_, Oct 18 2009