login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A074555 a(n) = 3^n + 6^n + 7^n. 1

%I #14 Sep 08 2022 08:45:07

%S 3,16,94,586,3778,24826,165034,1105666,7450978,50450986,343000474,

%T 2340300946,16018600978,109951298746,756592019914,5217760843426,

%U 36054083523778,249557302572106,1729973941999354,12008256087645106

%N a(n) = 3^n + 6^n + 7^n.

%H Vincenzo Librandi, <a href="/A074555/b074555.txt">Table of n, a(n) for n = 0..1000</a>

%H <a href="/index/Rec">Index entries for linear recurrences with constant coefficients</a>, signature (16,-81,126).

%F From _Mohammad K. Azarian_, Dec 30 2008: (Start)

%F G.f.: 1/(1-3*x) + 1/(1-6*x) + 1/(1-7*x).

%F E.g.f.: exp(3*x) + exp(6*x) + exp(7*x). (End)

%t Table[3^n + 6^n + 7^n, {n, 0, 20}]

%o (Magma) [3^n + 6^n + 7^n: n in [0..20]]; // _Vincenzo Librandi_, Aug 24 2011

%Y Cf. A001550, A001576, A034513, A001579, A074501 - A074580.

%K easy,nonn

%O 0,1

%A _Robert G. Wilson v_, Aug 23 2002

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 29 02:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)