A162967 - OEIS

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A162967

Values taken by the sigma(sigma(n)) function A051027, with repetition, sorted into ascending order.

0

1, 4, 7, 8, 12, 14, 15, 24, 24, 28, 28, 32, 32, 39, 39, 42, 56, 56, 60, 60, 60, 60, 63, 63, 72, 80, 84, 90, 91, 96, 96, 96, 96, 104, 112, 114, 120, 120, 120, 120, 124, 124, 124, 126, 128, 128, 133, 160, 168, 168, 168, 168, 171, 171, 186, 186, 195, 195, 195, 195, 195

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Removal of duplicates generates A070286. - R. J. Mathar, Jul 21 2009

LINKS

Table of n, a(n) for n=1..61.

CROSSREFS

Cf. A007609, A002191. - R. J. Mathar, Jul 21 2009

Sequence in context: A270082 A189223 A060833 * A070286 A324978 A047536

Adjacent sequences: A162964 A162965 A162966 * A162968 A162969 A162970

KEYWORD

nonn

AUTHOR

Jaroslav Krizek, Jul 19 2009

STATUS

approved