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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A010714 Period 2: repeat (4,9). 2
4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..80.

Index entries for linear recurrences with constant coefficients, signature (0,1).

FORMULA

a(n)=-5/2*(-1)^n+13/2 =9*(n mod 2)+4*[(n+1) mod 2] - Paolo P. Lava, Oct 20 2006

G.f. (4+9x)/((1-x)(1+x)). - R. J. Mathar, Nov 21 2011

PROG

(PARI) a(n)=4+n%2*5 \\ Charles R Greathouse IV, Dec 21 2011

CROSSREFS

Cf. A176219.

Sequence in context: A224299 A141653 A071793 * A284018 A089090 A204919

Adjacent sequences:  A010711 A010712 A010713 * A010715 A010716 A010717

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 October 17 10:43 EDT 2017. Contains 293469 sequences.