318713domain: NPropertiesPrimalityPrimeyesAppears in sequencesSixth term of weak prime septet: p(m-4)-p(m-5) < p(m-3)-p(m-4) < p(m-2)-p(m-3) < p(m-1)-p(m-2) < p(m)-p(m-1) < p(m+1)-p(m).at n=15A054839a(n) is the number of shallow permutations of length n that avoid 123.at n=17A382574Prime numbersat n=27500