125737domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p such that (3*p+q)/2, (p+3*q)/2, (3*q+r)/2 and (q+3*r)/2 are all prime, where q and r are the next primes after p.at n=6A332848Numbers k such that d(k) < d(k+1) < d(k+2) < d(k+3) < d(k+4), where d(n) is the number of divisors of n.at n=19A364717Prime numbersat n=11799