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 A082699 #22 Nov 09 2019 03:14:03 %S A082699 3,5,21,33,401,563,7017,37685 %N A082699 Numbers k such that (14*10^(k-1) - 41)/9 is a plateau prime. %C A082699 Prime versus probable prime status and proofs are given in the author's table. %D A082699 C. Caldwell and H. Dubner, "Journal of Recreational Mathematics", Volume 28, No. 1, 1996-97, pp. 1-9. %H A082699 Patrick De Geest, <a href="http://www.worldofnumbers.com/deplat.htm#pdp151">PDP Reference Table - 151</a>. %H A082699 Makoto Kamada, <a href="https://stdkmd.net/nrr/1/15551.htm#prime">Prime numbers of the form 155...551</a>. %H A082699 <a href="/index/Pri#Pri_rep">Index entries for primes involving repunits</a>. %F A082699 a(n) = A056246(n+1) + 2. %e A082699 k=21 -> (14*10^(21-1) - 41)/9 = 155555555555555555551. %Y A082699 Cf. A056246, A068646, A082697-A082720. %K A082699 nonn,base,more %O A082699 1,1 %A A082699 _Patrick De Geest_, Apr 13 2003 %E A082699 37685 from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008 %E A082699 Edited by _Ray Chandler_, Nov 04 2014