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 A082701 #23 Nov 09 2019 03:11:09 %S A082701 7,49,103,193,367,1003,20365,37447,56083 %N A082701 Numbers k such that (16*10^(k-1) - 61)/9 is a plateau prime. %C A082701 Prime versus probable prime status and proofs are given in the author's table. %D A082701 C. Caldwell and H. Dubner, "Journal of Recreational Mathematics", Volume 28, No. 1, 1996-97, pp. 1-9. %H A082701 Patrick De Geest, <a href="http://www.worldofnumbers.com/deplat.htm#pdp171">PDP Reference Table - 171</a>. %H A082701 Makoto Kamada, <a href="https://stdkmd.net/nrr/1/17771.htm#prime">Prime numbers of the form 177...771</a>. %H A082701 <a href="/index/Pri#Pri_rep">Index entries for primes involving repunits</a>. %F A082701 a(n) = A056248(n+1) + 2. %e A082701 k=7 -> (16*10^(7-1) - 61)/9 = 1777771. %Y A082701 Cf. A082697-A082720, A056248. %K A082701 nonn,base,more %O A082701 1,1 %A A082701 _Patrick De Geest_, Apr 13 2003 %E A082701 More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008 %E A082701 Edited by _Ray Chandler_, Nov 04 2014