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 A066269 #29 Feb 16 2025 08:32:45
%S A066269 2,3,33
%N A066269 Indices of primes in A066268.
%C A066269 The 33rd term, prime 16268...99999, contains 759 digits.
%C A066269 Next term is bigger than 150. - _Stefan Steinerberger_, May 06 2007
%C A066269 Next term is bigger than 450. - _Michael S. Branicky_, Nov 14 2024
%H A066269 Carlos Rivera, <a href="http://www.primepuzzles.net/puzzles/puzz_118.htm">Puzzle 118. Primorial product numbers</a>, The Prime Puzzles & Problems Connection.
%H A066269 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Primorial.html">Primorial</a>.
%t A066269 Select[Range[65], PrimeQ[Product[Product[Prime[i],{i,1,n}],{n,1,#}]-1]&] (* _Stefan Steinerberger_, Apr 12 2006 *)
%Y A066269 Cf. A066266, A066267, A066268, A002110, A006939, A006794.
%K A066269 nonn,hard,more,bref
%O A066269 1,1
%A A066269 _Patrick De Geest_, Dec 16 2001
%E A066269 Offset changed from 0 to 1 by _Harry J. Smith_, Feb 08 2010