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Search: id:A125842
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A125842 a(1)=1. a(n) = the number of terms from among the first floor(n/2) terms of the sequence which are coprime to n. +0
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1, 1, 1, 2, 2, 3, 3, 3, 4, 3, 5, 3, 6, 5, 5, 6, 8, 3, 9, 7, 6, 8, 11, 4, 11, 9, 7, 10, 14, 3, 15, 11, 9, 11, 14, 6, 18, 13, 10, 11, 20, 6, 21, 14, 9, 15, 23, 8, 23, 13, 15, 17, 26, 10, 22, 16, 17, 18, 29, 7, 30, 20, 15, 21, 27, 8, 33, 23, 20, 17, 35, 12, 36, 23, 17, 24, 30, 12, 39, 21, 24 (list; graph; listen)
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Last modified December 1 19:22 EST 2009. Contains 167811 sequences.


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