Search: id:A098147
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%I A098147
%S A098147 5,11,3,1,1,1,1,1,13,3,7,7,15,13,3,3,15,7,1,19,3,19,13,29,7,7,3,27,13,
               3,
%T A098147 1,9,9,9,27,7,3,7,49,55,81,3,3,9,7,11,69,7,19,13,39,7,1,3,13,13,39,77,
%U A098147 27,63,31,51,19,9,27,3,1,39,19,41,21,67,37,63,69,33,3,9,37,67,121,9,21
%N A098147 Difference between first odd semiprime > 10^n and 10^n.
%H A098147 Dario Alpern, <a href="http://www.alpertron.com.ar/ECM.HTM">Factorization 
               using the Elliptic Curve Method.</a>
%F A098147 a(n)=A098146(n)-10^n.
%e A098147 a(2)=11: The first odd semiprime following 10^2 is 111=3*37; 111-100=11.
%Y A098147 Cf. A098146, A033873 difference between first prime > 10^n and 10^n.
%Y A098147 Sequence in context: A159199 A125683 A125685 this_sequence A100298 A066461 
               A117069
%Y A098147 Adjacent sequences: A098144 A098145 A098146 this_sequence A098148 A098149 
               A098150
%K A098147 nonn
%O A098147 1,1
%A A098147 Hugo Pfoertner (hugo(AT)pfoertner.org), Aug 28 2004

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