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%I #8 Mar 31 2012 10:22:06
%S 127,2147483647,604462909807314587353087,
%T 10141204801825835211973625643007,
%U 170141183460469231731687303715884105727,2854495385411919762116571938898990272765493247
%N a(n)=2^A107006(n)-1.
%C A107006(n) are successive primes of the form 24n+7.
%t p = Select[24*Range[0, 20] + 7, PrimeQ]; 2^p - 1
%Y Cf. A107006, A124477, A135657, A135982.
%K nonn
%O 1,1
%A _Artur Jasinski_, Dec 09 2007