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 A082702 #19 Nov 09 2019 04:16:54 %S A082702 3,9,15,41,93,129,885,9425,14769,19259,31235 %N A082702 Numbers k such that (17*10^(k-1) - 71)/9 is a plateau prime. %C A082702 Prime versus probable prime status and proofs are given in the author's table. %D A082702 C. Caldwell and H. Dubner, "Journal of Recreational Mathematics", Volume 28, No. 1, 1996-97, pp. 1-9. %H A082702 Patrick De Geest, <a href="http://www.worldofnumbers.com/deplat.htm#pdp181">PDP Reference Table - 181</a>. %H A082702 Makoto Kamada, <a href="https://stdkmd.net/nrr/1/18881.htm#prime">Prime numbers of the form 188...881</a>. %H A082702 <a href="/index/Pri#Pri_rep">Index entries for primes involving repunits</a>. %F A082702 a(n) = A056249(n+1) + 2. %e A082702 k=15 -> (17*10^(15-1) - 71)/9 = 188888888888881. %Y A082702 Cf. A082697-A082720, A056249. %K A082702 nonn,base,more %O A082702 1,1 %A A082702 _Patrick De Geest_, Apr 13 2003 %E A082702 More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008 %E A082702 Edited by _Ray Chandler_, Nov 04 2014