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A116022 n*phi(n)*phi(phi(n)) is a palindrome. 0
1, 2, 3, 4, 309, 618, 9264, 43407 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

43407*phi(43407)*phi(phi(43407)) = 6739855589376.

CROSSREFS

Cf. A115891.

Sequence in context: A114341 A244548 A004877 * A172998 A004888 A062928

Adjacent sequences:  A116019 A116020 A116021 * A116023 A116024 A116025

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Feb 13 2006

STATUS

approved

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Last modified September 19 18:22 EDT 2020. Contains 337181 sequences. (Running on oeis4.)