Une période unique fait résonner toutes les fractions de n/19 en base 3.  

Le microscope numérique permet alors d'en observer le graphe. 

1/19=0,001102100221120122...

2/19=0,002211201220011021...

3/19=0,011021002211201220...

4/19=0,012200110210022112...

5/19=0,021002211201220011...

6/19=0,022112012200110210...

7/19=0,100221120122001102...

8/19=0,102100221120122001...

9/19=0,110210022112012200...

10/19=0,112012200110210022...

11/19=0,120122001102100221...

12/19=0,122001102100221120...

13/19=0,200110210022112012...

14/19=0,201220011021002211...

15/19=0,210022112012200110...

16/19=0,211201220011021002...

17/19=0,220011021002211201...

18/19=0,221120122001102100...