159347domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p such that p and p+2 are twin primes and also the strings 987654321p and 987654321p+2 are twin primes.at n=30A103818G.f.: Sum_{k>=0} x^k * Product_{j=1..3*k} (1 + x^j)/(1 - x^j).at n=29A385089Prime numbersat n=14625