120744domain: NAppears in sequencesTable T(n,k) giving number of two-legged knot diagrams with n >= 0 self-intersections and k >= 0 tangencies, read by antidiagonals.at n=22A067640Column 1 of table in A067640.at n=5A067641Expansion of g.f.: x/((1-x^2)^3 -1+x).at n=12A123888