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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A155636 9^n+5^n-1. 15
1, 13, 105, 853, 7185, 62173, 547065, 4861093, 43437345, 389373613, 3496550025, 31429887733, 282673677105, 2543086531453, 22882895970585, 205921649672773, 1853172776742465, 16677944639119693, 150098449994264745 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..18.

Index entries for linear recurrences with constant coefficients, signature (15,-59,45).

FORMULA

G.f.: 1/(1-9*x)+1/(1-5*x)-1/(1-x). E.g.f.: e^(9*x)+e^(5*x)-e^x.

a(n)=14*a(n-1)-45*a(n-2)-32 with a(0)=1, a(1)=13 - Vincenzo Librandi, Jul 21 2010

PROG

(PARI) a(n)=9^n+5^n-1 \\ Charles R Greathouse IV, Jun 11 2015

CROSSREFS

Cf. A155624, A155625, A155626, A155627, A155628, A155629, A155630, A155631, A155632, A155633, A155634, A155635.

Sequence in context: A320204 A080422 A030055 * A055902 A295249 A295648

Adjacent sequences:  A155633 A155634 A155635 * A155637 A155638 A155639

KEYWORD

nonn,easy

AUTHOR

Mohammad K. Azarian, Jan 30 2009

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
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 17 20:01 EDT 2019. Contains 328128 sequences. (Running on oeis4.)