The On-Line Encyclopedia of Integer Sequences® (OEIS®)

Revision History for A275468 (Underlined text is an addition; strikethrough text is a ~~deletion~~.)
Showing all changes.

A275468

Least k such that d(k*n^2) = d(n*k^2) where d = A000005.
(history; published version)

#9 by Susanna Cuyler at Tue Mar 20 19:01:20 EDT 2018

STATUS

proposed

approved

#8 by Antti Karttunen at Tue Mar 20 12:53:40 EDT 2018

STATUS

editing

proposed

#7 by Antti Karttunen at Tue Mar 20 11:47:00 EDT 2018

LINKS

Antti Karttunen, <a href="/A275468/b275468.txt">Table of n, a(n) for n = 1..65537</a>

STATUS

approved

editing

#6 by N. J. A. Sloane at Thu Jul 28 21:49:54 EDT 2016

STATUS

proposed

approved

#5 by Altug Alkan at Thu Jul 28 19:49:08 EDT 2016

STATUS

editing

proposed

#4 by Altug Alkan at Thu Jul 28 19:47:25 EDT 2016

EXAMPLE

a(32) = 6 because A000005(6*32^2) = A000005(32*6^2).

#3 by Altug Alkan at Thu Jul 28 19:30:19 EDT 2016

	COMMENTS	`Numbers n such that a(n) is different from A046523(n) are 32, 45, 48, 50, 63, ...`
	PROG	`((PARI) a(n) = {my(k = 1); while (numdiv(kn^2) != numdiv(nk^2), k++); k; }`

#2 by Altug Alkan at Thu Jul 28 19:22:04 EDT 2016

	NAME	`allocatedLeast k such forthat Altugd(kn^2) = d(nk^2) where Alkand = A000005.`
	DATA	`1, 2, 2, 4, 2, 6, 2, 8, 4, 6, 2, 12, 2, 6, 6, 16, 2, 12, 2, 12, 6, 6, 2, 24, 4, 6, 8, 12, 2, 30, 2, 6, 6, 6, 6, 36, 2, 6, 6, 24, 2, 30, 2, 12, 18, 6, 2, 45, 4, 18, 6, 12, 2, 24, 6, 24, 6, 6, 2, 60, 2, 6, 18, 64, 6, 30, 2, 12, 6, 30, 2, 72, 2, 6, 12, 12, 6, 30, 2, 48, 16, 6, 2, 60, 6, 6, 6, 24`
	OFFSET	`1,2`
	PROG	`(PARI) a(n) = {my(k = 1); while (numdiv(kn^2) != numdiv(nk^2), k++); k; }`
	CROSSREFS	`Cf. A000005, A046523.`
	KEYWORD	`allocated` `nonn`
	AUTHOR	`Altug Alkan, Jul 28 2016`
	STATUS	`approved` `editing`

#1 by Altug Alkan at Thu Jul 28 19:22:04 EDT 2016

Last modified August 29 21:34 EDT 2024. Contains 375518 sequences. (Running on oeis4.)