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A068970 Sum(phi(d^4)); d|n. +0
1
1, 9, 55, 137, 501, 495, 2059, 2185, 4429, 4509, 13311, 7535, 26365, 18531, 27555, 34953, 78609, 39861, 123463, 68637, 113245, 119799, 267675, 120175, 313001, 237285, 358723, 282083, 682893, 247995, 893731, 559241, 732105, 707481 (list; graph; listen)
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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.


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