Number of elements in a Farey sequence

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Number of elements in a Farey sequence by

Ciro Santilli 34 Updated 2024-11-19 Created 2024-07-12

en.wikipedia.org/w/index.php?title=Farey_sequence&oldid=1223364653#Sequence_length_and_index_of_a_fraction

∣ F_{n} ∣ = 1 + Φ (n)

where

Φ (n)

is the totient summatory function.

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