Une période unique fait résonner toutes les fractions de n/67 en base 7.  

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

1/67=0,005055645433064034411530131446241661611021233602632255136535220425...

2/67=0,013144624166161102123360263225513653522042500505564543306403441153...

3/67=0,021233602632255136535220425005055645433064034411530131446241661611...

4/67=0,026322551365352204250050556454330640344115301314462416616110212336...

5/67=0,034411530131446241661611021233602632255136535220425005055645433064...

6/67=0,042500505564543306403441153013144624166161102123360263225513653522...

7/67=0,050556454330640344115301314462416616110212336026322551365352204250...

8/67=0,055645433064034411530131446241661611021233602632255136535220425005...

9/67=0,064034411530131446241661611021233602632255136535220425005055645433...

10/67=0,102123360263225513653522042500505564543306403441153013144624166161...

11/67=0,110212336026322551365352204250050556454330640344115301314462416616...

12/67=0,115301314462416616110212336026322551365352204250050556454330640344...

13/67=0,123360263225513653522042500505564543306403441153013144624166161102...

14/67=0,131446241661611021233602632255136535220425005055645433064034411530...

15/67=0,136535220425005055645433064034411530131446241661611021233602632255...

16/67=0,144624166161102123360263225513653522042500505564543306403441153013...

17/67=0,153013144624166161102123360263225513653522042500505564543306403441...

18/67=0,161102123360263225513653522042500505564543306403441153013144624166...

19/67=0,166161102123360263225513653522042500505564543306403441153013144624...

20/67=0,204250050556454330640344115301314462416616110212336026322551365352...

21/67=0,212336026322551365352204250050556454330640344115301314462416616110...

22/67=0,220425005055645433064034411530131446241661611021233602632255136535...

23/67=0,225513653522042500505564543306403441153013144624166161102123360263...

24/67=0,233602632255136535220425005055645433064034411530131446241661611021...

25/67=0,241661611021233602632255136535220425005055645433064034411530131446...

26/67=0,250050556454330640344115301314462416616110212336026322551365352204...

27/67=0,255136535220425005055645433064034411530131446241661611021233602632...

28/67=0,263225513653522042500505564543306403441153013144624166161102123360...

29/67=0,301314462416616110212336026322551365352204250050556454330640344115...

30/67=0,306403441153013144624166161102123360263225513653522042500505564543...

31/67=0,314462416616110212336026322551365352204250050556454330640344115301...

32/67=0,322551365352204250050556454330640344115301314462416616110212336026...

33/67=0,330640344115301314462416616110212336026322551365352204250050556454...

34/67=0,336026322551365352204250050556454330640344115301314462416616110212...

35/67=0,344115301314462416616110212336026322551365352204250050556454330640...

36/67=0,352204250050556454330640344115301314462416616110212336026322551365...

37/67=0,360263225513653522042500505564543306403441153013144624166161102123...

38/67=0,365352204250050556454330640344115301314462416616110212336026322551...

39/67=0,403441153013144624166161102123360263225513653522042500505564543306...

40/67=0,411530131446241661611021233602632255136535220425005055645433064034...

41/67=0,416616110212336026322551365352204250050556454330640344115301314462...

42/67=0,425005055645433064034411530131446241661611021233602632255136535220...

43/67=0,433064034411530131446241661611021233602632255136535220425005055645...

44/67=0,441153013144624166161102123360263225513653522042500505564543306403...

45/67=0,446241661611021233602632255136535220425005055645433064034411530131...

46/67=0,454330640344115301314462416616110212336026322551365352204250050556...

47/67=0,462416616110212336026322551365352204250050556454330640344115301314...

48/67=0,500505564543306403441153013144624166161102123360263225513653522042...

49/67=0,505564543306403441153013144624166161102123360263225513653522042500...

50/67=0,513653522042500505564543306403441153013144624166161102123360263225...

51/67=0,522042500505564543306403441153013144624166161102123360263225513653...

52/67=0,530131446241661611021233602632255136535220425005055645433064034411...

53/67=0,535220425005055645433064034411530131446241661611021233602632255136...

54/67=0,543306403441153013144624166161102123360263225513653522042500505564...

55/67=0,551365352204250050556454330640344115301314462416616110212336026322...

56/67=0,556454330640344115301314462416616110212336026322551365352204250050...

57/67=0,564543306403441153013144624166161102123360263225513653522042500505...

58/67=0,602632255136535220425005055645433064034411530131446241661611021233...

59/67=0,611021233602632255136535220425005055645433064034411530131446241661...

60/67=0,616110212336026322551365352204250050556454330640344115301314462416...

61/67=0,624166161102123360263225513653522042500505564543306403441153013144...

62/67=0,632255136535220425005055645433064034411530131446241661611021233602...

63/67=0,640344115301314462416616110212336026322551365352204250050556454330...

64/67=0,645433064034411530131446241661611021233602632255136535220425005055...

65/67=0,653522042500505564543306403441153013144624166161102123360263225513...

66/67=0,661611021233602632255136535220425005055645433064034411530131446241...