166441831domain: NPropertiesPrimalityPrimeyesAppears in sequencesOdd numbers that are neither of the form p + 2^k nor of the form p - 2^k with k > 0, and p prime.at n=21A263644Primes that are neither of the form p + 2^k nor of the form p - 2^k with k > 0, and p prime.at n=5A263645Prime numbersat n=9315032