246839domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p such that q-p = 50, where q is the next prime after p.at n=15A134124Number of nonnegative integer arrays of length n+2*4-2 with new values introduced in order 0 upwards and every value appearing only in runs of at least 4.at n=26A211696Prime numbersat n=21784