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A078774 n*phi(n*phi(n)). 0
1, 2, 6, 16, 40, 24, 84, 128, 162, 160, 440, 192, 624, 336, 480, 1024, 2176, 648, 2052, 1280, 1512, 1760, 5060, 1536, 5000, 2496, 4374, 2688, 9744, 1920, 7440, 8192, 5280, 8704, 6720, 5184, 15984, 8208, 11232, 10240, 26240, 6048, 21672, 14080, 12960 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..45.

EXAMPLE

a(3)=3*phi(3*phi(3))=3*phi(6)=6

MATHEMATICA

Table[n*EulerPhi[n*EulerPhi[n]], {n, 50}]

PROG

(PARI) for (n=1, 100, print1(n*eulerphi(n*eulerphi(n))", "))

CROSSREFS

Sequence in context: A285885 A273348 A198951 * A174016 A265725 A129952

Adjacent sequences:  A078771 A078772 A078773 * A078775 A078776 A078777

KEYWORD

nonn

AUTHOR

Jon Perry, Jan 09 2003

STATUS

approved

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Last modified July 15 16:29 EDT 2019. Contains 325049 sequences. (Running on oeis4.)