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 A082705 #19 Nov 10 2019 01:32:50 %S A082705 7,9,895,1525,3037,21157 %N A082705 Numbers k such that (29*10^(k-1) + 7)/9 is a depression prime. %C A082705 Prime versus probable prime status and proofs are given in the author's table. %D A082705 C. Caldwell and H. Dubner, "Journal of Recreational Mathematics", Volume 28, No. 1, 1996-97, pp. 1-9. %H A082705 Patrick De Geest, <a href="http://www.worldofnumbers.com/deplat.htm#pdp323">PDP Reference Table - 323</a>. %H A082705 Makoto Kamada, <a href="https://stdkmd.net/nrr/3/32223.htm#prime">Prime numbers of the form 322...223</a>. %H A082705 <a href="/index/Pri#Pri_rep">Index entries for primes involving repunits</a>. %F A082705 a(n) = A056252(n) + 2. %e A082705 k=9 -> (29*10^(9-1) + 7)/9 = 322222223. %Y A082705 Cf. A082697-A082720, A056252. %K A082705 nonn,base,hard,more %O A082705 1,1 %A A082705 _Patrick De Geest_, Apr 13 2003 %E A082705 More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008 %E A082705 Edited by _Ray Chandler_, Nov 05 2014