929737domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 91.at n=14A031679Number of subsets of {1, ..., n} that are sum-free but not double-free.at n=32A088811Prime numbersat n=73455