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 A082715 #34 Nov 10 2019 01:33:42 %S A082715 3,5,87,113,171,567,1689,8903,115811 %N A082715 Numbers k such that (71*10^(k-1) - 17)/9 is a plateau prime. %C A082715 Prime versus probable prime status and proofs are given in the author's table. %D A082715 C. Caldwell and H. Dubner, The near repdigit primes A(n-k-1)B(1)A(k), especially 9(n-k-1)8(1)9(k), Journal of Recreational Mathematics, Volume 28, No. 1, 1996-97, pp. 1-9. %H A082715 Patrick De Geest, <a href="http://www.worldofnumbers.com/deplat.htm#pdp787">PDP Reference Table - 787</a>. %H A082715 Makoto Kamada, <a href="https://stdkmd.net/nrr/7/78887.htm#prime">Prime numbers of the form 788...887</a>. %H A082715 <a href="/index/Pri#Pri_rep">Index entries for primes involving repunits</a>. %F A082715 a(n) = A056262(n) + 2. %e A082715 k=5 -> (71*10^(5-1) - 17)/9 = 78887. %Y A082715 Cf. A082697-A082720, A056262. %K A082715 nonn,base,hard,more %O A082715 1,1 %A A082715 _Patrick De Geest_, Apr 13 2003 %E A082715 115811 from _Ray Chandler_, Aug 05 2011 %E A082715 a(2)=5 corrected by _Patrick De Geest_, Apr 28 2013 %E A082715 Edited by _Ray Chandler_, Nov 05 2014