133153domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p for which p^i + 4 is prime for i = 1, 3 and 5.at n=16A243780Primes p for which p^i + 4 is prime for i = 1, 3, 5 and 7.at n=1A243859Prime numbers whose binary expansion contains only prime powers of 2 and the zeroth power.at n=21A342475Prime numbersat n=12427