64994domain: NAppears in sequencesNumber of (weakly) superprimitive binary sequences of length n.at n=16A216215Number of permutations p of [n] such that |p(i) - p(i-1)| is in {1,3} for all i from 2 to n.at n=22A302118Semiprimes with only semiprime digits, each appearing at least once.at n=31A349275