Nonary is the base-9 numeral system, using the digits 0, 1, 2, 3, 4, 5, 6, 7, and
8. In expanded notation, a nonary numeral 
represents the nonnegative
integer
 |
where each 
is a digit value from 0 to 8. For example, 
in decimal. The
place values of the fractional part are the negative
powers 
, 
,
....
The nonary digit strings for successive nonnegative integers, beginning with 0, are 0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, ... (OEIS A007095).
Since 
, each nonary digit
corresponds to two ternary digits,
allowing a leading zero within each pair. For example, 
.
