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 A146214 #23 Oct 18 2023 09:58:59 %S A146214 3,107,3821,79559,1260989,18409199,252427601,3285916169,41375648687, %T A146214 507575862527,6100479510551 %N A146214 a(n) = (10^n)-th lower twin prime. %C A146214 The Gcc with Gmp program is at the bottom of the link. The link also has a PARI bisection algorithm which gives a very good approximation for the n-th prime number and the n-th twin prime number. For example the 10^10-th lower twin prime approximation is 6100475249386, this has a relative error of 0.000000698... from the actual a(10) above. %C A146214 The (10^n)-th upper twin prime is given as a(n)+2 = (5,109,3823,79561, 1260991,18409201,252427603,...). - _M. F. Hasler_, Dec 06 2008 %H A146214 Cino Hilliard, <a href="http://groups.google.com/group/sumprimes/web/sumtwinsfirstn-c">Approximating the n-th lower twin prime</a> (broken link) %F A146214 a(n) = A001359(10^n). - _M. F. Hasler_, Dec 06 2008 %e A146214 For n=1, the first 10 lower twin primes (A001359) are: 3,5,11,17,29,41,59,71,101,107. So a(1) = 107 is the 10th lower twin prime. %Y A146214 Cf. A001097, A001359, A147797. %K A146214 nonn,more %O A146214 0,1 %A A146214 _Cino Hilliard_, Oct 28 2008 %E A146214 a(0) from _Zak Seidov_, Oct 29 2008 %E A146214 Edited and cross-references added by _M. F. Hasler_, Dec 06 2008