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 A166620 #6 Jun 02 2025 02:09:28
%S A166620 1,4,16,18,22,36,40,44,52,72,110,138,144,154,160,162,166,176,178,212,
%T A166620 224,246,252,272,282,286,292,298,306,326,330,374,386,420,428,442,446,
%U A166620 468,472,478,482,488,498,512,518,524,532,534,550,556,564,586,602,628
%N A166620 Positions of primes in A105720.
%t A166620 Flatten[Position[Table[Total[Prime[Range[n,2n]]],{n,700}],_?PrimeQ]] (* _Harvey P. Dale_, Jun 10 2014 *)
%Y A166620 Cf. A166619 (Primes in A105720), A105720
%K A166620 nonn
%O A166620 1,2
%A A166620 _Zak Seidov_, Oct 18 2009