130127domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) is the n-th prime that ends with prime(n), or 0 if there do not exist n primes ending with prime(n).at n=30A089778Primes formed by concatenating n with n-3.at n=13A279213Primes formed from the concatenation of n and previousprime(n).at n=33A280388Prime numbersat n=12172