Search: id:A136005
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%I A136005
%S A136005 3,7,31,127,8191,131071,524287,2147483647,137438953471,2199023255551,
%T A136005 8796093022207,9007199254740991,2305843009213693951,
%U A136005 147573952589676412927,9444732965739290427391
%N A136005 Numbers of the form 2^p - 1, where p is a prime number that is not the 
               sum, minus 1, of a Pythagorean triple.
%C A136005 See A136003 for the values of p.
%F A136005 a(n) = 2^A136003(n) - 1.
%e A136005 a(3)=31 because A136003(3)=5 and 2^5=32 and 32-1=31.
%Y A136005 Cf. A000079, A000668, A136002, A136003.
%Y A136005 Sequence in context: A093535 A081093 A057612 this_sequence A088552 A000668 
               A136007
%Y A136005 Adjacent sequences: A136002 A136003 A136004 this_sequence A136006 A136007 
               A136008
%K A136005 nonn
%O A136005 1,1
%A A136005 Omar E. Pol (info(AT)polprimos.com), Dec 17 2007

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