%I A146214
%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>
%F A146214 a(n) = A001359(10^n) [From M. F. Hasler, Dec 06 2008]
%e A146214 The first 10 lower twin primes are 3,5,11,17,29,41,59,71,101,107. So 
               107 is the 10-th lower twin prime.
%Y A146214 Cf. A001097, A147797.
%Y A146214 Sequence in context: A023325 A094200 A003705 this_sequence A061308 A112879 
               A053861
%Y A146214 Adjacent sequences: A146211 A146212 A146213 this_sequence A146215 A146216 
               A146217
%K A146214 nonn
%O A146214 0,1
%A A146214 Cino Hilliard (hillcino368(AT)hotmail.com), Oct 28 2008
%E A146214 a(0) from Zak Seidov, Oct 29 2008
%E A146214 Edited and added cross-references. - M. F. Hasler (MHasler(AT)univ-ag.fr), 
               Dec 06 2008