Triangle read by rows: T(n,k) (n>=2, 2<=k<=n) = number of figure 8's having 2n edges in one loop and 2k edges in the other and which are weakly embeddable in the square lattice.

A323852

Triangle read by rows: T(n,k) (n>=2, 2<=k<=n) = number of figure 8's having 2n edges in one loop and 2k edges in the other and which are weakly embeddable in the square lattice.