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 A171430 #14 Feb 25 2020 11:22:39 %S A171430 2,3,7,17,19,127,131,139,373,383,8419,64553,175211,3523901,3524713, %T A171430 70115789,514273231,514275283,1394194363,1394197423,1394197543, %U A171430 1394198683,1394198863,1394199083,1394199263,1394199283,10246935823,204475053103,4086199302923,11091501631097 %N A171430 Primes that are congruent to 3 mod n, where n is the index of the prime. %H A171430 Giovanni Resta, <a href="/A171430/b171430.txt">Table of n, a(n) for n = 1..46</a> %e A171430 Mod(7,4)=3, Mod(17,7)=3. %t A171430 Prime@ Select[Range[10^5], Mod[Prime[#] - 3, #] == 0 &] (* _Giovanni Resta_, Feb 25 2020 *) %Y A171430 Cf. A023145, A048891. %K A171430 nonn %O A171430 1,1 %A A171430 _Vladimir Joseph Stephan Orlovsky_, Dec 08 2009 %E A171430 a(14) from _Harvey P. Dale_, Oct 21 2016 %E A171430 Terms a(1)-a(2), a(17) and beyond from _Giovanni Resta_, Feb 23 2020