1.333333...? Maybe you're thinking musical notes.

Fib series

1,1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144

1, 1/2, 2/3 ....... 34/55 (.618), 55/89 (.618), 89/144 (.618)

alternatively

1, 2, 3/2 ........ 55/34 (1.618) 89/55 (1.618) 144/89 (1.618)

Just kick back and have fun with this:

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