The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A004729

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A004729

Divisors of 2^32 - 1 (for a(1) to a(31), the 31 regular polygons with an odd number of sides constructible with ruler and compass).
(history; published version)

#25 by Michel Marcus at Sat Dec 20 03:29:56 EST 2014

STATUS

reviewed

approved

#24 by Joerg Arndt at Sat Dec 20 03:08:02 EST 2014

STATUS

proposed

reviewed

#23 by Michel Marcus at Sat Dec 20 02:18:48 EST 2014

STATUS

editing

proposed

#22 by Michel Marcus at Sat Dec 20 02:18:24 EST 2014

LINKS

<a href="/index/Di#divisors">Index entries for sequences related to divisors of numbers</a>

STATUS

proposed

editing

#21 by Jon E. Schoenfield at Sat Dec 20 02:01:33 EST 2014

STATUS

editing

proposed

#20 by Jon E. Schoenfield at Sat Dec 20 02:01:31 EST 2014

COMMENTS

The only known odd numbers whose totient is a power of 2 . - Labos Elemer, Dec 06 2000

Equals first 32 members of A001317. Also, equals first 32 members of A053576. [From _- _Omar E. Pol_, Dec 10 2008]

LINKS

Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/RegularPolygon.html">Regular Polygon</a>, <a href="http://mathworld.wolfram.com/SierpinskiSieve.html">Sierpinski Sierpiński Sieve</a>, <a href="http://mathworld.wolfram.com/ConstructiblePolygon.html">Constructible Polygon</a>

AUTHOR

N. J. A. Sloane.

STATUS

approved

editing

#19 by N. J. A. Sloane at Tue Oct 15 22:30:14 EDT 2013

COMMENTS

The only known odd numbers whose totient is a power of 2 - _Labos E. (labos(AT)ana.sote.hu), Elemer_, Dec 06 2000

Discussion

Tue Oct 15

22:30

OEIS Server: https://oeis.org/edit/global/2029

#18 by Russ Cox at Fri Mar 30 17:33:47 EDT 2012

COMMENTS

Equals first 32 members of A001317. Also, equals first 32 members of A053576. [From _Omar E. Pol (info(AT)polprimos.com), _, Dec 10 2008]

Discussion

Fri Mar 30

17:33

OEIS Server: https://oeis.org/edit/global/157

#17 by Russ Cox at Fri Mar 30 17:23:07 EDT 2012

EXTENSIONS

Edited by _Daniel Forgues (kephalopod(AT)gmail.com), _, Jun 17 2011

Discussion

Fri Mar 30

17:23

OEIS Server: https://oeis.org/edit/global/122

#16 by Russ Cox at Fri Mar 30 16:44:26 EDT 2012

AUTHOR

_N. J. A. Sloane (njas(AT)research.att.com)_.

Discussion

Fri Mar 30

16:44

OEIS Server: https://oeis.org/edit/global/110