71549domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of unlabeled 3-element intersecting families (with not necessarily distinct sets) of an n-element set.at n=17A055484Lesser of twin pairs in A086006.at n=1A158476Primes such that the next 10 prime gaps are all distinct.at n=28A372550Prime numbersat n=7086