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%I #3 Oct 01 2013 17:58:09
%S 3,13,61,251,1021,4093,16381,65521,262139,1048573,4194301,16777213,
%T 67108859,268435399,1073741789,4294967291,17179869143,68719476731,
%U 274877906899,1099511627689,4398046511093,17592186044399,70368744177643
%N Largest prime <= 4^n.
%o (PARI) g(n,b) = for(x=0,n,print1(precprime(b^x)","))
%K easy,nonn
%O 1,1
%A _Cino Hilliard_, Mar 03 2005
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