296909domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) is the smallest prime q such that (q-p)/(r-q) = n, where p<q<r are consecutive primes (or 0 if none exist).at n=32A179256Prime numbers for which the sum of reciprocals of nonzero digits equals 1.at n=20A239685Prime numbersat n=25764