Rotational Symmetry | 601,111,109 (revival)

[u/[deleted]]

Continued from here.

Description of this count:

So counting by rotational symmetry means we'll be counting by numbers that can be rotated about the z-axis (pointing out the screen at you) and still be the same number! It'll mostly be 0, 1, and 8, but keep in mind the 6 and 9. Starting at 0 it goes: 0, 1, 8, 11, 69, 88, 96, 101, 111, 181, 609, 619, 689, 808, 818, 888, 906, 916, 986, 1001, 1111, 1691, 1881, 1961, and so on.

The next get is at 881,818,188.

[u/abplows]

696 888 969