A116022 n*phi(n)*phi(phi(n)) is a palindrome.

1, 2, 3, 4, 309, 618, 9264, 43407

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 A355439

Adjacent sequences: A116019 A116020 A116021 * A116023 A116024 A116025

Keyword

nonn,base

Author

Giovanni Resta, Feb 13 2006

Status

approved