103919domain: NPropertiesPrimalityPrimeyesAppears in sequencesSixth term of strong prime sextets: 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).at n=32A054818Numerators of the sums of reciprocals of the Collatz (3x+1) sequence beginning with n and stopping at 1.at n=21A225761Prime numbersat n=9924