6200923domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) = (14^(2*n+1) + 3^(2*n+1)) / 17.at n=3A138200Prime(k), where k is such that (1 + Sum_{i=1..k} prime(i)^2) / k is an integer.at n=30A233862Prime numbersat n=425708