146306domain: NAppears in sequencesNumbers of the form 12*k + 2 with nonempty inverse totient set.at n=20A063668Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 0), (0, 1, -1), (0, 1, 1), (1, 0, 1)}.at n=9A150538