The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A082413

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A082413

a(n) = (2*9^n + 3^n)/3.
(history; published version)

#13 by Michel Marcus at Sun Sep 09 04:08:56 EDT 2018

STATUS

reviewed

approved

#12 by Joerg Arndt at Sun Sep 09 02:33:33 EDT 2018

STATUS

proposed

reviewed

#11 by Jon E. Schoenfield at Sun Sep 09 01:10:35 EDT 2018

STATUS

editing

proposed

#10 by Wesley Ivan Hurt at Sat Sep 08 20:19:12 EDT 2018

FORMULA

eE.g.f.: (2*exp(9*x) + exp(3*x))/3.

STATUS

proposed

editing

#9 by Jon E. Schoenfield at Sat Sep 08 20:04:38 EDT 2018

STATUS

editing

proposed

#8 by Jon E. Schoenfield at Sat Sep 08 20:04:27 EDT 2018

NAME

a(n) = (2*9^n + 3^n)/3.

FORMULA

G.f.: (1-5*x)/((1-3*x)*(1-9*x)); E.g.f.: (2*exp(9*x)+exp(3*x))/3.

a(n)=e.g.f.: (2*exp(9^n*x) + exp(3^n*x))/3.

a(n) = (2*9^n + 3^n)/3.

MAPLE

seq((2*9^n+3^n)/3, n=0..19); # _Nathaniel Johnston, _, Jun 26 2011

STATUS

approved

editing

#7 by Charles R Greathouse IV at Sat Jun 13 00:51:01 EDT 2015

LINKS

<a href="/index/Rec#order_02">Index to sequences with entries for linear recurrences with constant coefficients</a>, signature (12,-27).

Discussion

Sat Jun 13

00:51

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

#6 by R. J. Mathar at Fri Nov 07 14:09:07 EST 2014

STATUS

editing

approved

#5 by R. J. Mathar at Fri Nov 07 14:09:03 EST 2014

LINKS

<a href="/index/Rec#order_02">Index to sequences with linear recurrences with constant coefficients</a>, signature (12,-27).

STATUS

approved

editing

#4 by Russ Cox at Fri Mar 30 18:58:49 EDT 2012

AUTHOR

_Paul Barry (pbarry(AT)wit.ie), _, Apr 23 2003

Discussion

Fri Mar 30

18:58

OEIS Server: https://oeis.org/edit/global/287