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A072161 Denominator of Sum_{k=1..n} phi(k)/k^4. +0
2
1, 16, 1296, 10368, 6480000, 6480000, 15558480000, 124467840000, 3360631680000, 3360631680000, 49203008426880000, 49203008426880000, 1405287123680119680000, 1405287123680119680000, 1405287123680119680000, 11242296989440957440000 (list; graph; listen)
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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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