Search: id:A108047
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%I A108047
%S A108047 1,1,11,111,11111,11111111,1111111111111,111111111111111111111,1111111111111111111111111111111111,
%T A108047 1111111111111111111111111111111111111111111111111111111,11111111111111111111111111111111111111111111111111111\
               111111111111111111111111111111111111,
%U A108047 1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111\
               11111111111111111111111111111111111
%N A108047 Concatenation of pairs of numbers with the first two terms 1 and 1.
%C A108047 (10^F(n)-1)/9.
%F A108047 a(n)=A037842(n-2), n>1. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), 
               Aug 24 2008]
%e A108047 The third term is 11 which is the concatenation of the first two terms 
               1 and 1.
%Y A108047 Sequence in context: A015468 A037842 A131293 this_sequence A144784 A030175 
               A058949
%Y A108047 Adjacent sequences: A108044 A108045 A108046 this_sequence A108048 A108049 
               A108050
%K A108047 nonn,base
%O A108047 1,3
%A A108047 Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Jun 01 2005

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