Each step is nine less.
18, 27, 36, 45, 54, 63.
9, 18, 27, 36, 45, 54, 63, 72
15, 30, 45, 60, 75, 90... 9, 18, 27, 36, 45, 54, 63...
9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99 . . .
the next multiple of 9 is 18, 27, 36, 45, 54, 63, 72, 81.....
699, 18, 27, 36, 45, 54, 63
9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99.
3
9 18 27 36 45 54 63 72 81 909, 18, 27, 36, 45, 54
9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99 and on to infinity.
9, 18, 27, 36, 45, 54, 63.
18, 27, 36, 45, 54, 63.
Possibly: 45-54
45 54
9, 18, 27, 36, 45, 54, 63, 72.
9, 18, 27, 36, 45, 54, 63, 72.
9, 18, 27, 36, 45, 54, 63, 72, 81