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A116003 n*phi(n)*phi(phi(n)) is a fourth power. 0
1, 32, 512, 3888, 8192, 25000, 62208, 131072, 314928, 400000, 759375, 995328, 2097152, 2839714, 3037500 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

3888*phi(3888)*phi(phi(3888))=216^4.

CROSSREFS

Cf. A055744, A116002.

Sequence in context: A238534 A297091 A271577 * A035711 A035477 A109384

Adjacent sequences:  A116000 A116001 A116002 * A116004 A116005 A116006

KEYWORD

nonn

AUTHOR

Giovanni Resta, Feb 13 2006

STATUS

approved

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Last modified August 15 11:25 EDT 2022. Contains 356145 sequences. (Running on oeis4.)