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 A319266 #13 Aug 04 2019 04:08:17 %S A319266 5,6,7,8,10,12,17,18,19,27,34,36,46,48,64,65,72,73,76,86,103,106,118, %T A319266 125,133,153,156,159,178,201,259,263,266,270,284,295,306,307,318,352, %U A319266 388,406,513,515,528,542,548,620,653,669,673,743,747,770,795,823,839 %N A319266 Indices of primes in sequence A000607. %H A319266 Vaclav Kotesovec, <a href="/A319266/b319266.txt">Table of n, a(n) for n = 1..2752</a> %e A319266 12 is in the sequence because A000607(12) = 7 is prime. %Y A319266 Cf. A000607, A319265, A319267. %K A319266 nonn %O A319266 1,1 %A A319266 _Vaclav Kotesovec_, Sep 16 2018