176,851 4,421,275 Including stoichiometries of 1 ≤ w,x,y,z≤ 8: n = 2 n = 3 n = 4 8.1x104 1.1x107 1.1x109 Aw Bx Aw Bx Cy Aw Bx Cy Dz combos 3.4x106 4.8x109 4.1x1012 Element Combinations Considering the first 103 elements: Including all known oxidation states: Stoichiometry limit? Ternary pyrochlore oxides: A2 B2 O7 Quaternary double perovskites: A2 BCO6