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%I #7 Mar 31 2012 10:26:44
%S 1,1,1,1,1,15,66747,475425,12124167,14899339905,8073774344085
%N a(n) is the smallest natural number m such that 2^(2^k) + m is prime for k=0,1,...,n.
%C The first five terms of this sequence correspond to known Fermat primes.
%Y Cf. A090872, A090874, A090875, A129614, A129615.
%K nonn
%O 0,6
%A _Farideh Firoozbakht_, May 13 2007, May 16 2007
%E a(10) from _Jens Kruse Andersen_, Jun 05 2010
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