829289domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p such that p, p+30, p+60 are consecutive primes.at n=26A052195a(n) = a(n-1) + (1+a(n-2))*a(n-3) for n>1, a(1) = 1, a(n) = 0 for n<1.at n=12A209286Prime numbersat n=66116