Why does the list of elements for the D_6hgroup in Table 27.2 not list the elements C²₆, C³₆, and C⁴₆?

Selected Point Groups and Their Elements Symmetry Elements TABLE 27.2 Example Molecule BFCIB (planar) Point Group E, o E, C2 E, C2, o, o' E, C3, C3, 30 C, H2O2 C2 H,0 NF3 C2v C3y HCI E, C, 000 Coov trans-C,H,F, E, C2, o, i C,F4 E, C2, C3, C5, o, o', o", i Dah SO, E, C3, C, 3C,, S3, s, , 3' E, C4, C, C2, 2C3, 2C, i, S4, S, o, 2o', 20" E, C6, C, C3, C, C2, 3C2, 3C5, i, S3, s, S6, So, o, 30', 3" E, C0, So0, 00C2, 000, o', i E, 4C3, 4C3, 3C, 3S4, 3.S2, 60 D3h XEF4 Dah C,H, (benzene) Don H2, CO, Dooh CH4 Ta SF6 E, 4C3, 4C3, 6C,, 3C4, 3C,, i, 3S4, 383, , 452, 30, 6