1,1

Do[ If[ PrimeQ[ 2^n + 19 ], Print[ n ] ], {n, 1, 15000} ]

Sequence in context: A122763 A005432 A009422 this_sequence A127115 A096769 A111059

Adjacent sequences: A057218 A057219 A057220 this_sequence A057222 A057223 A057224

nonn

Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 17 2000