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A061765 usigma(sigma(n)), where usigma(n) is the sum of unitary divisors of n (A034448) and sigma(n) is the sum of the divisors (A000203). 2
1, 4, 5, 8, 12, 20, 9, 24, 14, 30, 20, 40, 24, 36, 36, 32, 30, 56, 30, 96, 33, 50, 36, 120, 32, 96, 54, 72, 72, 90, 33, 80, 68, 84, 68, 112, 60, 120, 72, 180, 96, 132, 60, 160, 168, 90, 68, 160, 80, 128, 90, 150, 84, 216, 90, 216, 102, 180, 120, 288 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Nathaniel Johnston, Table of n, a(n) for n = 1..10000

CROSSREFS

Sequence in context: A027975 A011980 A260163 * A242274 A297419 A230549

Adjacent sequences:  A061762 A061763 A061764 * A061766 A061767 A061768

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Oct 30 2001

STATUS

approved

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Last modified April 5 19:39 EDT 2020. Contains 333257 sequences. (Running on oeis4.)