The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A243473 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A243473

a(n) = numerator(sigma(n)/n) - denominator(sigma(n)/n) where sigma(n) = sum of divisors of n.
(history; published version)

#15 by N. J. A. Sloane at Sun May 08 22:42:25 EDT 2016

STATUS

proposed

approved

#14 by Michel Marcus at Sun May 08 14:33:18 EDT 2016

STATUS

editing

proposed

#13 by Michel Marcus at Sun May 08 10:46:04 EDT 2016

LINKS

Michel Marcus, <a href="/A243473/b243473.txt">Table of n, a(n) for n = 1..10000</a>

STATUS

approved

editing

#12 by N. J. A. Sloane at Wed May 04 19:04:31 EDT 2016

STATUS

reviewed

approved

#11 by G. C. Greubel at Wed May 04 17:44:13 EDT 2016

STATUS

proposed

reviewed

#10 by Michel Marcus at Wed May 04 12:45:27 EDT 2016

STATUS

editing

proposed

#9 by Michel Marcus at Wed May 04 12:42:24 EDT 2016

NAME

Numeratora(n) = numerator(sigma(n)/n) - denominator(sigma(n)/n) where sigma(n) = sum of divisors of n.

COMMENTS

a(n) > n for n in A069057. - Michel Marcus, May 04 2016

CROSSREFS

Cf. A000203, A001065, A014567, A017665, A017666, A053813, A069057.

STATUS

approved

editing

#8 by Bruno Berselli at Wed Sep 09 09:14:20 EDT 2015

STATUS

reviewed

approved

#7 by Joerg Arndt at Wed Sep 09 09:13:19 EDT 2015

STATUS

proposed

reviewed

#6 by Michael De Vlieger at Wed Sep 09 08:28:51 EDT 2015

STATUS

editing

proposed