A179195 Triangle array: row n lists the number of repeating digits of 1/2 through 1/(n-1) in base n, or 0 if it terminates.
1, 0, 1, 1, 2, 1, 0, 0, 0, 1, 1, 1, 2, 4, 1, 0, 2, 0, 4, 2, 1, 1, 0, 1, 2, 1, 3, 1, 0, 1, 0, 0, 1, 6, 0, 1, 1, 2, 2, 1, 2, 3, 2, 6, 1, 0, 0, 0, 4, 0, 6, 0, 0, 4, 1, 1, 1, 1, 4, 1, 2, 2, 3, 4, 10, 1, 0, 1, 0, 1, 1, 0, 0, 6, 2, 5, 2, 1, 1, 0, 2, 0, 1, 1, 2, 0, 1, 5, 2, 12, 1, 0, 1, 0, 1, 1, 3, 0, 3, 1, 5, 1, 3, 3, 1
Offset: 3
Examples
Rows show the number of repeating digits for: 1/2 base 3 1/2 base 4, 1/3 base 4 1/2 base 5, 1/3 base 5, 1/4 base 5
Crossrefs
Cf. A066799 (similar table but does not differentiate terminating versus non-terminating values.)