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Revision History for A334136

(Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A334136

a(n) = (n-1)*sigma(n) where sigma is the sum of divisors A000203.
(history; published version)

#19 by Alois P. Heinz at Tue Apr 21 19:50:58 EDT 2020

STATUS

reviewed

approved

#18 by Peter Kagey at Tue Apr 21 16:01:01 EDT 2020

STATUS

proposed

reviewed

#17 by Omar E. Pol at Tue Apr 21 13:58:53 EDT 2020

STATUS

editing

proposed

#16 by Omar E. Pol at Sun Apr 19 13:12:08 EDT 2020

CROSSREFS

Partial sums give A332264.

STATUS

approved

editing

Discussion

Sun Apr 19

13:13

Omar E. Pol: Added a cross-reference in a young sequence.

#15 by Michel Marcus at Thu Apr 16 01:24:58 EDT 2020

STATUS

reviewed

approved

#14 by Joerg Arndt at Thu Apr 16 00:56:11 EDT 2020

STATUS

proposed

reviewed

#13 by Omar E. Pol at Wed Apr 15 20:41:12 EDT 2020

STATUS

editing

proposed

#12 by Omar E. Pol at Wed Apr 15 20:20:00 EDT 2020

FORMULA

a(n) = A064987(n) - A000203(n). - Omar E. Pol, Apr 15 2020

STATUS

proposed

editing

#11 by Ilya Gutkovskiy at Wed Apr 15 16:37:43 EDT 2020

STATUS

editing

proposed

#10 by Ilya Gutkovskiy at Wed Apr 15 15:43:17 EDT 2020

FORMULA

G.f.: Sum_{k>=2} (k^2 - 1) * x^k / (1 - x^k)^2. - Ilya Gutkovskiy, Apr 15 2020

STATUS

approved

editing