460768domain: NAppears in sequencesNumber of words of length 6 in the n(n-1)/2 transpositions of S[ n ] equivalent to the identity.at n=7A029700Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 0), (-1, 1, 1), (1, -1, 0), (1, 0, 1), (1, 1, -1)}.at n=10A149479