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A080647 Sum of prime factors of phi(n). +0
1
2, 2, 2, 2, 5, 2, 5, 2, 7, 2, 5, 5, 2, 2, 2, 5, 5, 2, 5, 7, 13, 2, 7, 5, 5, 5, 9, 2, 10, 2, 7, 2, 5, 5, 5, 5, 5, 2, 7, 5, 12, 7, 5, 13, 25, 2, 12, 7, 2, 5, 15, 5, 7, 5, 5, 9, 31, 2, 10, 10, 5, 2, 5, 7, 16, 2, 13, 5, 14, 5, 5, 5, 7, 5, 10, 5, 18, 2, 5, 7, 43, 5, 2, 12, 9, 7, 13, 5, 5, 13, 10, 25, 5, 2, 5 (list; graph; listen)
OFFSET

3,1

MATHEMATICA

Table[Apply[Plus, Transpose[FactorInteger[EulerPhi[n]]][[1]]], {n, 3, 100}]

CROSSREFS

Adjacent sequences: A080644 A080645 A080646 this_sequence A080648 A080649 A080650

Sequence in context: A123487 A130325 A107604 this_sequence A118486 A141299 A035681

KEYWORD

nonn

AUTHOR

Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Feb 28 2003

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.


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