266447domain: NPropertiesPrimalityPrimeyesAppears in sequencesStart of a string of exactly 3 consecutive (but disjoint) pairs of twin primes.at n=28A035791a(n) is the least start of a run of exactly n successive squarefree numbers (A005117) that are odd, or -1 if no such run exists.at n=8A373551Prime numbersat n=23348