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Search: id:A100677
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A100677 a(1) = 1; a(n) = sum{1<=k<=n/2, GCD(k,n)=1} a(k). +0
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1, 1, 1, 1, 2, 1, 3, 2, 3, 2, 6, 3, 7, 4, 6, 7, 12, 6, 15, 8, 9, 10, 23, 12, 22, 16, 25, 20, 37, 17, 43, 29, 30, 29, 45, 31, 68, 41, 56, 48, 91, 43, 100, 59, 69, 65, 133, 69, 129, 80, 114, 103, 183, 91, 152, 123, 147, 135, 265, 104, 282, 172, 215, 215, 274, 165, 384, 233, 277, 203 (list; graph; listen)
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Last modified December 19 12:50 EST 2009. Contains 171053 sequences.


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