33554221domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(1)=1. a(n) = smallest prime > a(n-1) such that sum{k=1 to n} a(k) is a power of a prime.at n=8A139019Smallest prime q such that q + prime(n) is a power of 2.at n=46A191474Prime numbersat n=2063678