The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A056916 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A056916

Product of the orders of the elements in a cyclic group with n elements.
(history; published version)

#21 by Joerg Arndt at Wed Jul 31 11:24:09 EDT 2019

STATUS

proposed

approved

#20 by Amiram Eldar at Wed Jul 31 11:20:57 EDT 2019

STATUS

editing

proposed

#19 by Amiram Eldar at Wed Jul 31 11:20:52 EDT 2019

LINKS

Amiram Eldar, <a href="/A056916/b056916.txt">Table of n, a(n) for n = 1..388</a>

STATUS

approved

editing

#18 by Jon E. Schoenfield at Mon Sep 04 17:21:48 EDT 2017

STATUS

editing

approved

#17 by Jon E. Schoenfield at Mon Sep 04 17:21:44 EDT 2017

MAPLE

a:=n->mul(denom (k/n), k=1..n): seq(a(n), n=1..18); - _# _Zerinvary Lajos_, Apr 26 2008

STATUS

approved

editing

#16 by N. J. A. Sloane at Tue Jun 24 01:08:14 EDT 2014

EXTENSIONS

Edited by _Dean Hickerson (dean.hickerson(AT)yahoo.com), _, Mar 04 2002

Discussion

Tue Jun 24

01:08

OEIS Server: https://oeis.org/edit/global/2238

#15 by Charles R Greathouse IV at Thu Nov 21 12:47:25 EST 2013

MATHEMATICA

Table[Product[n/GCD[n, i], {i, 0, n-1}], {n, 30}] (* From _Harvey P. Dale, _, Oct 24 2011 *)

Discussion

Thu Nov 21

12:47

OEIS Server: https://oeis.org/edit/global/2062

#14 by N. J. A. Sloane at Wed Oct 09 02:23:25 EDT 2013

MAPLE

a:=n->mul(denom (k/n), k=1..n): seq(a(n), n=1..18); - _Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), _, Apr 26 2008

Discussion

Wed Oct 09

02:23

OEIS Server: https://oeis.org/edit/global/1991

#13 by Charles R Greathouse IV at Fri May 10 12:44:31 EDT 2013

FORMULA

a(n) = Product_{ d divides n } d^phi(d). - _Vladeta Jovovic (vladeta(AT)eunet.rs), _, Sep 10 2004

Discussion

Fri May 10

12:44

OEIS Server: https://oeis.org/edit/global/1911

#12 by T. D. Noe at Mon Oct 24 16:28:00 EDT 2011

STATUS

editing

approved