42997349domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(1) = 1, a(2) = 5, for n >= 3, a(n) = smallest prime > a(n-1) such that a(n) mod a(n-1) = a(n-2).at n=9A175207p-INVERT of (0,0,1,2,3,4,5,...), the nonnegative integers A000027 preceded by one zero, where p(S) = 1 - S - S^2.at n=29A290991Prime numbersat n=2604382