The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A020707 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A020707

Pisot sequences E(4,8), L(4,8), P(4,8), T(4,8).
(history; published version)

#44 by Charles R Greathouse IV at Thu Sep 08 08:44:45 EDT 2022

PROG

(MAGMAMagma) [2^(n+2): n in [0..40]]; // Vincenzo Librandi, Apr 28 2011

Discussion

Thu Sep 08

08:44

OEIS Server: https://oeis.org/edit/global/2944

#43 by Peter Luschny at Mon May 17 05:01:57 EDT 2021

STATUS

reviewed

approved

#42 by Michel Marcus at Sat May 15 12:36:02 EDT 2021

STATUS

proposed

reviewed

#41 by Stefano Spezia at Sat May 15 06:24:35 EDT 2021

STATUS

editing

proposed

#40 by Stefano Spezia at Sat May 15 06:24:25 EDT 2021

FORMULA

E.g.f.: 4*exp(2*x). - Stefano Spezia, May 15 2021

CROSSREFS

Cf. A051916.

STATUS

approved

editing

#39 by Michel Marcus at Sun Jul 09 14:56:30 EDT 2017

STATUS

reviewed

approved

#38 by Joerg Arndt at Sun Jul 09 12:27:26 EDT 2017

STATUS

proposed

reviewed

Discussion

Sun Jul 09

12:52

Muniru A Asiru: Please remove the submission.

#37 by Joerg Arndt at Sun Jul 09 11:16:05 EDT 2017

STATUS

editing

proposed

Discussion

Sun Jul 09

12:27

Joerg Arndt: It simply doesn't belong here (and arguably in all of the OEIS).

#36 by Joerg Arndt at Sun Jul 09 11:15:58 EDT 2017

FORMULA

a(n) = 2^(n+2). a(n) = 2*a(n-1).

a(n) = 2*a(n-1).

a(n) = phi(a(n)) + a(n)/2. - Muniru A Asiru, Jul 09 2017

MATHEMATICA

2^(Range[0, 50] + 2) (*The same as:*) 2^Range[2, 52] (* _ _Vladimir Joseph Stephan Orlovsky_, Jun 09 2011 *)

#35 by Muniru A Asiru at Sun Jul 09 11:13:41 EDT 2017

FORMULA

a(n) = phi(a(n)) + a(n)/2. - Muniru A Asiru, Jul 09 2017

STATUS

proposed

editing

Discussion

Sun Jul 09

11:32

Muniru A Asiru: Is this supposed to be  a COMMENT or a FORMULA?  The result came up while I was working on other things and I decided to contribute it. Please guide me further.