The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A090729 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A090729

a(n) = 21a(n-1) - a(n-2), starting with a(0) = 2 and a(1) = 21.
(history; published version)

#23 by N. J. A. Sloane at Sat Dec 07 12:18:24 EST 2019

PROG

(Sage) [lucas_number2(n, 21, 1) for n in xrangerange(0, 20)] # Zerinvary Lajos, Jun 27 2008

Discussion

Sat Dec 07

12:18

OEIS Server: https://oeis.org/edit/global/2837

#22 by Bruno Berselli at Tue Feb 07 09:24:19 EST 2017

STATUS

proposed

approved

#21 by Indranil Ghosh at Tue Feb 07 09:08:33 EST 2017

STATUS

editing

proposed

#20 by Indranil Ghosh at Tue Feb 07 09:08:28 EST 2017

LINKS

Indranil Ghosh, <a href="/A090729/b090729.txt">Table of n, a(n) for n = 0..755</a>

STATUS

approved

editing

#19 by Charles R Greathouse IV at Sat Jun 13 00:51:17 EDT 2015

LINKS

<a href="/index/Rec#order_02">Index to sequences with entries for linear recurrences with constant coefficients</a>, signature (21,-1).

Discussion

Sat Jun 13

00:51

OEIS Server: https://oeis.org/edit/global/2439

#18 by R. J. Mathar at Sat Sep 27 15:55:03 EDT 2014

STATUS

editing

approved

#17 by R. J. Mathar at Sat Sep 27 15:54:56 EDT 2014

LINKS

<a href="/index/Rea#recLCC">Index entries for sequences related to linear recurrences with constant coefficients</a>

<a href="/index/Rec#order_02">Index to sequences with linear recurrences with constant coefficients</a>, signature (21,-1).

EXTENSIONS

More terms from Robert G. Wilson v, Jan 30 2004

STATUS

approved

editing

#16 by Michael Somos at Tue May 27 22:32:29 EDT 2014

STATUS

editing

approved

#15 by Michael Somos at Tue May 27 22:32:22 EDT 2014

MATHEMATICA

a[0] = 2; a[1] = 21; a[n_] := 21a[n - 1] - a[n - 2]; Table[ a[n], {n, 0, 15}] (from * _Robert G. Wilson v _, Jan 30 2004 *)

PROG

sage: (Sage) [lucas_number2(n, 21, 1) for n in xrange(0, 20)] - _# _Zerinvary Lajos_, Jun 27 2008

STATUS

approved

editing

Discussion

Tue May 27

22:32

Michael Somos: Light edits.

#14 by N. J. A. Sloane at Wed Oct 09 02:24:02 EDT 2013

PROG

sage: [lucas_number2(n, 21, 1) for n in xrange(0, 20)] - _Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), _, Jun 27 2008

Discussion

Wed Oct 09

02:24

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