333101domain: NPropertiesPrimalityPrimeyesAppears in sequencesSmallest prime of the form: all threes followed by prime(n). a(n) >prime(n). 0 if no such prime exists.at n=25A114785S-D transform of Catalan numbers A000108.at n=12A121908Palindromic primes in the sense of A007500 with digits '0', '1' and '3' only.at n=36A199303Prime numbersat n=28647