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A034095 Indices of (-1)sigma perfect numbers. 1
1, 1, 1, 1, 1, 2, 2, 2, 1, 2, 1, 1, 2, 2, 2, 2, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

LINKS

Table of n, a(n) for n=1..17.

FORMULA

a(n) = (-1)sigma(A034094(n))/A034094(n) where (-1)sigma(n) = A049060(n).

CROSSREFS

Cf. A034094.

Sequence in context: A191516 A168141 A232654 * A105971 A280314 A080354

Adjacent sequences:  A034092 A034093 A034094 * A034096 A034097 A034098

KEYWORD

nonn,more

AUTHOR

Yasutoshi Kohmoto

EXTENSIONS

a(1)=1 prepended and offset corrected by Michel Marcus, Jun 02 2016

STATUS

approved

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Last modified January 22 15:57 EST 2019. Contains 319364 sequences. (Running on oeis4.)