140390505643domain: NAppears in sequencesNumber of (s(0), s(1), ..., s(2n)) such that 0 < s(i) < 7 and |s(i) - s(i-1)| = 1 for i = 1,2,...,2*n, s(0) = 1, s(2n) = 3.at n=22A094790Semiprimes in A006053.at n=10A122499