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 A082716 #27 Nov 10 2019 01:33:46 %S A082716 3,5,29,157,323,353,1213,1285,7985,15193,84773,119931,148861 %N A082716 Numbers k such that (72*10^(k-1) - 27)/9 is a plateau prime. %C A082716 Prime versus probable prime status and proofs are given in the author's table. %D A082716 C. Caldwell and H. Dubner, "Journal of Recreational Mathematics", Volume 28, No. 1, 1996-97, pp. 1-9. %H A082716 Patrick De Geest, <a href="http://www.worldofnumbers.com/deplat.htm#pdp797">PDP Reference Table - 797</a>. %H A082716 Makoto Kamada, <a href="https://stdkmd.net/nrr/7/79997.htm#prime">Prime numbers of the form 799...997</a>. %H A082716 <a href="/index/Pri#Pri_rep">Index entries for primes involving repunits</a>. %F A082716 a(n) = A056263(n) + 2. %e A082716 k=5 -> (72*10^(5-1) - 27)/9 = 79997. %Y A082716 Cf. A082697-A082720, A056263. %K A082716 nonn,base,more %O A082716 1,1 %A A082716 _Patrick De Geest_, Apr 13 2003 %E A082716 a(11)=84773 from _Ray Chandler_, Jan 03 2011 %E A082716 a(12)=119931 from _Ray Chandler_, Apr 01 2011 %E A082716 a(13)=148861 from _Ray Chandler_, Apr 09 2011 %E A082716 Edited by _Ray Chandler_, Nov 04 2014