1000199domain: NPropertiesPrimalityPrimeyesAppears in sequencesSmallest prime of the form 10^k + prime(n), k >= d, the number of digits in prime(n). 0 if no such primes exist. a(n) = 0 if prime(n) + 1 == 0 (mod 3).at n=45A114782Prime numbers such that each digit is the sum of two or more other digits.at n=3A203592Prime numbersat n=78514