login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A013780 4^(4n+1). 2
4, 1024, 262144, 67108864, 17179869184, 4398046511104, 1125899906842624, 288230376151711744, 73786976294838206464, 18889465931478580854784, 4835703278458516698824704, 1237940039285380274899124224 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Tanya Khovanova, Recursive Sequences

Index entries for linear recurrences with constant coefficients, signature (256).

FORMULA

a(n)=256*a(n-1), n>0 ; a(0)=4 . G.f.: 4/(1-256*x). - Philippe Deléham, Nov 27 2008

MATHEMATICA

NestList[256#&, 4, 20] (* Harvey P. Dale, Aug 09 2013 *)

PROG

(MAGMA) [4^(4*n+1): n in [0..15]]; // Vincenzo Librandi, Jun 17 2011

(PARI) a(n)=4^(4*n+1) \\ Charles R Greathouse IV, Jul 11 2016

CROSSREFS

Sequence in context: A024059 A069920 A217024 * A139300 A004804 A221228

Adjacent sequences:  A013777 A013778 A013779 * A013781 A013782 A013783

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy .

Last modified June 24 02:34 EDT 2017. Contains 288697 sequences.