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!)
A009975 Powers of 31: a(n) = 31^n. 45

%I #48 Jul 12 2023 12:39:00

%S 1,31,961,29791,923521,28629151,887503681,27512614111,852891037441,

%T 26439622160671,819628286980801,25408476896404831,787662783788549761,

%U 24417546297445042591,756943935220796320321,23465261991844685929951,727423121747185263828481

%N Powers of 31: a(n) = 31^n.

%C Same as Pisot sequences E(1, 31), L(1, 31), P(1, 31), T(1, 31). Essentially same as Pisot sequences E(31, 961), L(31, 961), P(31, 961), T(31, 961). See A008776 for definitions of Pisot sequences.

%C The compositions of n in which each natural number is colored by one of p different colors are called p-colored compositions of n. For n>=1, a(n) equals the number of 31-colored compositions of n such that no adjacent parts have the same color. - _Milan Janjic_, Nov 17 2011

%H T. D. Noe, <a href="/A009975/b009975.txt">Table of n, a(n) for n = 0..100</a>

%H Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/RecursiveSequences.html">Recursive Sequences</a>

%H <a href="/index/Rec#order_01">Index entries for linear recurrences with constant coefficients</a>, signature (31).

%F G.f.: 1/(1-31*x). - _Philippe Deléham_, Nov 24 2008

%F E.g.f.: exp(31x). - _Geoffrey Critzer_, Feb 28 2009

%F a(n) = 31*a(n-1). - _Zerinvary Lajos_, Apr 29 2009

%t Table[31^n, {n, 0, 15}] (* _Robert P. P. McKone_, Jan 04 2022 *)

%o (PARI) a(n)=31^n \\ _Charles R Greathouse IV_, Sep 24 2015

%K nonn,easy

%O 0,2

%A _N. J. A. Sloane_

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 April 19 23:40 EDT 2024. Contains 371798 sequences. (Running on oeis4.)