1922351domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of permutations of 1..n with displacements restricted to {-6,-5,-4,-3,-1,0,2}.at n=20A189594Emirps p such that, if q is the next emirp after p, p*q mod (p+q) and floor(p*q/(p+q)) are both emirps.at n=19A350884Prime numbersat n=143573