206191domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p such that p, p+6, p+12, p+18 are consecutive primes and p = 6*k+1 for some k.at n=29A090837Primes p(k) such that p(k+1)=p(k)+6, p(k+2)=p(k+1)+6, p(k+3)=p(k+2)+6, p(k+4)=p(k+3)+12, p(k+5)=p(k+4)+12.at n=0A115946Prime numbersat n=18481