460915984384domain: NAppears in sequencesNumber of walks of length 2n+6 in the path graph P_7 from one end to the other.at n=20A005022Number of (s(0), s(1), ..., s(2n+1)) such that 0 < s(i) < 8 and |s(i) - s(i-1)| = 1 for i = 1,2,...,2n+1, s(0) = 1, s(2n+1) = 6.at n=21A094811