Trilinears            f(a,b,c) : f(b,c,a) : f(c,a,b), where f(a,b,c) = a(a⁴ - b⁴ - c⁴ + bc(b² + c² - a²)
Barycentrics    af(a,b,c) : bf(b,c,a) : cf(c,a,b)

X(3220) is the homothetic center of the following two triangles: tangential triangles of the excentral triangle, and excentral triangle of the tangential triangle. (Note from Peter Moses, 1/24/2007)

X(3220) lies on these lines:
1,159    3,9    19,990    22,63    25,57    35,984    36,238    48,991    56,269    58,1474    100,2751    101,1818    103,2272    104,2728    154,222    165,197    184,2003    219,1350    511,2323    603,2212    759,2722    1040,1763