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A067883 Numbers n such that n=phi(sigma(phi(sigma(n)))). 0
1, 2, 4, 6, 8, 12, 48, 60, 72, 96, 128, 240, 432, 480, 720, 1728, 2016, 6912, 10368, 14080, 32768, 142560, 184320, 196560, 712800, 1140480, 1190400, 1658880, 1801800, 3345408, 3571200, 5702400, 6220800, 8363520 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..34.

CROSSREFS

Sequence in context: A136101 A187779 A086141 * A325557 A283769 A338352

Adjacent sequences:  A067880 A067881 A067882 * A067884 A067885 A067886

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre, Mar 02 2002

EXTENSIONS

More terms from Reiner Martin (reinermartin(AT)hotmail.com), Jul 09 2002

STATUS

approved

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Last modified September 18 01:39 EDT 2021. Contains 347504 sequences. (Running on oeis4.)